Earth and
Life Science
Earth and Life Science
Origin and Structure Of the
Earth (Planet Earth)
Earth and Life Science
Origin and Structure of the Earth – Planet Earth
First Edition, 2020
Republic Act 8293, Section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Rochelle M. Mercado
Editors:
Melanie I. Samudio , Jocelyn M. Manset
Reviewer:
Jason Ricaforte, Angelica Beriña, Princess Paolah L. De Guzman, Marissa C. Betchaida , Elaine T. Balaogan,
Louie L. Alvarez, Gregorio M. De Chavez, Jr., Jocelyn M. Manset, Mario B. Maramot,, Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan,
Merthel M. Evardome, Nadine C. Celindro, Nicolas M. Burgos, Fe M. Ong-ongowan , Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
Introductory Message
For the facilitator:
Welcome to the Earth and Life Science Grade 11 Alternative Delivery Mode (ADM) Module.
This module was collaboratively designed, developed, and reviewed by educators both from public and private
institutions to assist you, the teacher or facilitator, in helping the learners meet the standards set by the K to 12
Curriculum while overcoming their personal, social, and economic constraints in schooling.
This learning resource hopes to engage the learners into guided and independent learning activities at their own
pace and time. Furthermore, this also aims to help learners acquire the needed 21st century skills while taking into
consideration their needs and circumstances.
As a facilitator, you are expected to orient the learners on how to use this module, encourage and assist them as
they do the tasks, and track their progress while allowing to manage their learnings.
For the learner:
Welcome to the Earth and Life Science Grade 11 Alternative Delivery Mode (ADM) Module.
The hand is one of the most symbolized parts of the human body. It is often used to depict skill, action, and purpose.
Through our hands, we may learn, create, and accomplish many things. Hence, the hand in this learning resource
signifies that you, as a learner, are capable and empowered to successfully achieve the relevant competencies and
skills at your own pace and time. Your academic success lies in your own hands!
This module was designed to provide you with fun and meaningful opportunities for guided and independent
learning. You will be enable to process the contents of the learning resource while being an active learner.
This module has the following parts and corresponding icons:
What I Need to Know
This will give you an idea of the skills or competencies you are expected to learn in the
module.
What I Know
This part includes an activity that aims to check what you already know about the lesson
to take. If you get all the answers correct (100%), you may decide to skip this module.
What’s In
This is a brief drill or review to help you link the current lesson with the previous one.
What’s New
In this portion, the new lesson will be introduced to you in various ways such as a story,
a song, a poem, a problem opener, an activity or a situation.
What is It
This section provides a brief discussion of the lesson. This aims to help you discover
and understand new concepts and skills.
What’s More
This comprises activities for independent practice to solidify your understanding and
skills of the topic. You may check the answers to the exercises using the Answer Key at
the end of the module.
What I Have Learned
This includes questions or blank sentence/paragraph to be filled in to process what you
learned from the lesson.
What I Can Do
This section provides an activity which will help you transfer your new knowledge or
skill into real life situations or concerns.
Assessment
This is a task which aims to evaluate your level of mastery in achieving the learning
competency.
Additional Activities
In this portion, another activity will be given to you to enrich your knowledge or skill of
the lesson learned. This also tends retention of learned concepts.
Answer Key
This contains answers to all activities in the module.
At the end of this module you will also find:
References
This is the list of all sources in developing this module.
1
Week
1
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the nature of Earth and Life Science. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module focuses on the lesson:
Lesson 1 – Planet Earth
After going through this module, you are expected to:
1. identify the characteristics of the Earth that supports life; and
2. expound how the characteristics of the Earth sustain the needs of living
organism.
What I Know
Choose the letter of the best answer. Write the chosen letter on a separate sheet of
paper.
1. Why is Earth called “the living planet?”
A. It sustains life.
C. It has water at the surface
B. It has atmosphere
D. All of the above
2. Which among the set of planets are called terrestrial?
A. Jupiter, Neptune, Uranus
B. Mercury, Venus, Mars, Earth
C. Earth, Venus, Mars, Jupiter
D. Jupiter, Saturn, Uranus, Neptune
3. What makes planet Earth uniquely different from other planets?
A. It has soil.
C. It has people.
B. It has tress.
D. It has liquid water.
4. What makes planet Earth habitable?
A. It has comfortable distance from the sun.
B. It has atmosphere that protects from radiation.
C. The atmosphere holds carbon dioxide and other gases.
D. All of the above
5. Why is Earth called a terrestrial planet?
A. It has life
C. It is farther from the sun
B. It is closest to the sun
D. It is placed at almost the middle planets
6. Which of the following best describes the surface of the planet Earth?
A. a thick layer of hydrogen gas
B. cloudy and hot with lots of volcano
C. cold, rocky, and covered with red dust
D. mostly water surface with some areas of land
2
7. What makes Earth different from other planets in the solar system?
A. It supports life.
B. It is mostly covered in water.
C. Its atmosphere is mostly nitrogen and oxygen.
D. All of the above
8. Earth is the only planet that can support ___
A. life
C. a rocky core
B. a moon
D. an atmosphere
9. How many percent of water comprises the Earth?
A. 15%
C. 50%
B. 30%
D. 70%
10. What are the factors that make Earth habitable?
A. temperature and nutrient
C. only A
B. atmosphere and energy
D. both A and B
11. What nutrients does the Earth have to maintain an organism’s body to
survive?
A. Earth has a water cycle and atmosphere
B. Earth has volcanic activities to circulate nutrients.
C. Earth has sub-surface water or molten rock that can circulate and
replenish nutrients for organisms.
D. All of the above
12.
What makes Earth similar to Venus?
A. Earth and Venus are the right sizes to hold a sufficient atmosphere.
B. Venus’ atmosphere is 100 times thicker than Earth.
C. Among all the solid planets and moons, only Earth, Venus, and Titan
have significant atmospheres.
D. Both A and C
13. Why are humans and other living organisms capable to live on earth?
A. Earth has no protective equipment like ozone.
B. Earth has layer water only for favorable climate.
C. Earth has man-made natural cycles
D. Earth’s temperature is neither the hottest nor the coldest among other
planets.
14. What makes Earth different from any other planets in the Solar System?
A. It is the only rocky planet.
B. It is the only planet that turns around in space.
C. It is the only planet that has a large amount of liquid water.
D. It is the only planet that changes its structure
15. What does Earth offer to human for survival?
A. Earth has abundant plant life.
B. Earth has sufficient nutrients from ocean to land.
C. Only A
D. Both A and B.
3
Lesson 1
Origin and Structure of the EarthPlanet Earth
Earth is the only planet in the solar system known to harbour life. Our planet’s has
molten nickel-iron core give rise to an extensive magnetic field, which, along with the
atmosphere, shields us from harmful radiation coming from the Sun. In this module,
you will understand why this planet is called the “living planet.”
What’s In
Just a part of the vast universe is the solar system. From the previous concepts
learned, identify the planets in the solar system in the given illustration.
Question: What do you think are the characteristics of the planet Earth that make
it different from all the other planets?
4
What’s New
Earth: A Habitable Planet
Read the document carefully and answer the questions that follow
Table 1. Factors that make a planet habitable
Factors that
make a
Planet
Habitable
Not Enough of the
Factor
Just Right
Too Much of the Factor
Situation in the Solar
System
Temperature
influences how
quickly atoms
and molecules
move.
Low temperatures
cause chemicals to
react slowly, which
interferes with the
reactions necessary for
life. It can also cause
the freezing of water,
making liquid water
unavailable.
Life seems to be
limited to a
temperature range of
-15oC to 115oC. In
this range, liquid
water can still exist
under certain
conditions.
At about 125oC, protein
and carbohydrate
molecules, and the genetic
material (e.g., DNA and
RNA) start to break apart.
Also, high temperatures
cause the quick
evaporation of water.
Surface: only the Earth’s
surface is in this temperature
range. Sub-surface: the
interior of the solid planets
and moons may be in this
temperature range.
Atmosphere
Small planets and
moons have
insufficient gravity to
hold an atmosphere.
The gas molecules
escape to space,
leaving the planet or
moon without an
insulating blanket or a
protective shield.
Earth and Venus are
the right size to hold
a sufficient
atmosphere. Earth’s
atmosphere is about
100 miles thick. It
keeps the surface
warm and protects it
from radiation and
small- to mediumsized meteorites.
Venus’s atmosphere is
100 times thicker than
Earth’s. It is made almost
entirely of greenhouse
gasses, making the
surface too hot for life.
The four giant planets are
completely made of gas.
Of the solid planets and
moons, only Earth, Venus,
and Titan have significant
atmospheres. Mars’
atmosphere is about 1/100th
that of Earth’s, too small for
significant insulation or
shielding.
Energy
When there is too little
sunlight or too few of
the chemicals that
provide energy to cells,
such as iron or sulfur,
organisms die.
With a steady input
of either light or
chemical energy,
cells can run the
chemical reactions
necessary for life.
Light energy is a problem
if it makes a planet too
hot or if there are too
many harmful rays, such
as ultraviolet. Too many
energy-rich chemicals is
not a problem
Surface: The inner planets
get too much sunlight for life.
The outer planets get too
little.
Without chemicals to
make proteins and
carbohydrates, organisms
cannot grow. Planets
without systems to deliver
nutrients to its organisms
(e.g., a water cycle or
volcanic activity) cannot
support life. Also, when
nutrients are spread so
thin that they are hard to
obtain, such as on a gas
planet, life cannot exist.
All solid planets and
moons have the same
general chemical
makeup, so nutrients
are present. Those with
a water cycle or volcanic
activity can transport
and replenish the
chemicals required by
living organisms.
Too many nutrients are not a
problem. However, too active
a circulation system, such as
the constant volcanism on
Jupiter’s moon, Io, or the
churning atmospheres of the
gas planets, interferes with an
organism’s ability to get
enough nutrients.
Surface: Earth has a water cycle,
an atmosphere, and volcanoes to
circulate nutrients. Venus, Titan,
Io, and Mars have nutrients and
ways to circulate them to
organisms.
Nutrients used to
build and
maintain an
organism’s body.
Sub-surface: Most solid
planets and moons have
energy-rich chemicals.
Sub-surface: Any planet or moon
with sub-surface water or molten
rock can circulate and replenish
nutrients for organisms
Factors that make a planet habitable. National Science Foundation, n,d.http://www.lpi.usara.edu/education/explore/our_place/hab_ref_table.pdf
Question:
1. What are the factors that make the planet habitable?
2. What are the characteristics of planet Earth that makes it habitable?
5
What is It
Earth is the only place in the known universe confirmed to host life and is the only
one known for sure to have liquid water in the surface. These are reasons why
planet earth is a unique one: (1) It has liquid water; (2) Plate Tectonics; and (3) It
has atmosphere that shelters it from the worst of the sun’s rays.
Earth is the only planet in the solar system that has a large amount of liquid water.
About 70% of the surface of the Earth is covered by liquid or frozen water. Because
of this, Earth is sometimes called “blue planet.” Planet Earth is habitable because it
has the right distance from the sun. It is kept warm by an insulating atmosphere,
and it has the right chemical ingredients for life including water and carbon. It can
provide water, oxygen, useful biological products for human, and has suitable
weather and climate.
Earth, Venus, and Mars may have similarities: (1) They all are terrestrial planets,
made of solid rocks and silicates; (2) They all have an atmosphere; (3) They all
almost have the same time to rotate on their axes; (4) Earth and Mars both have
water; (5) They all have carbon dioxide; and (6 All have landforms. Earth, Venus,
and Mars have differences: (1) Venus has no water; (2) Venus and Mars don’t have
oxygen; and (3) Earth has life forms.
What’s More
Activity 1.1 Understanding Planet Earth
Compare and Contrast
How is planet Earth similar and different from Venus and Mars? Provide possible
explanations for your observations using the information in the table.
VENUS
EARTH
Mass (1024kg)
4.87
5.97
Diameter (km)
12,104
12,756
Density (kg/m3)
5243
5514
Gravity (m/s2)
8.9
9.8
Escape Velocity (km/s)
10.4
11.2
Surface pressure (bars)
92
1
Composition of atmosphere
96% CO2, 3.5% N
77%N, 21% O2, 1%Ar
Major Greenhouse Gases(GHG)
CO2
CO2 H2O
Mean Temperature (0C)
464
15
Temperature if no greenhouse gases are
-46
-18
present
Changes in Temperature (0C) due to
+523
+33
greenhouse gases
Distance from the Sun (106km)
108.2
149.6
Orbital Period (days)
224.7
365.2
Orbital Velocity (km/s)
35
29.8
Length of day (hours)
2802
24
Global Magnetic Field
No
Yes
Comparison of the features of Venus, Earth, and Mars
(National Aeronautics and Space Administration, 2015)
6
MARS
0.642
6792
3933
3.7
5
0.01
95%CO2, 2.7%N, 1.6%Ar
CO2
-65
-57
+10
227.9
687
24.1
24.7
No
What I Have Learned
1. Planet Earth is considered habitable because of the following reasons: (1) it
has the right distance from the sun; (2) it is protected from harmful solar
radiation by its magnetic field; (3) it is kept warm by an insulating atmosphere;
and (4) it has the right amount of ingredients for life, including water and
carbon.
2. Earth is different from other planet in a way that it is the only planet with
liquid water on the surface.
a. Earth, Venus, and Mars may have similarities: (1) They all are terrestrial
planets, made of solid rocks and silicates; (2) They all have an atmosphere;
(3) They all almost have the same time to rotate on their axes; (4) Earth
and Mars both have water; (5) They all have carbon dioxide; and (6) All
have landforms.
a. Earth, Venus, and Mars have differences: (1) Venus has no water; (2)
Venus and Mars don’t have oxygen; and (3) Earth has life forms.
What I Can Do
Earth Day generally falls in the third week of April. There are a lot of great lessons
about how our behavior and activity affect others and our planet.
List down ten (10) activities that you can do to save planet Earth and identify those
activities as a form of recycling, reducing, or reusing.
RECYCLE
REDUCE
REUSE
Assessment
Multiple Choice. Choose the letter of the best answer. Write the chosen letter on a
separate sheet of paper.
1. What makes planet earth different from the other planets in the solar system?
A. It supports life.
C. The atmosphere holds gases.
B. It is mostly covered in water.
D. All of the above
2. Planet Earth is uniquely different from other planets because __________.
A. It has people that live in it.
B. It has soil where trees grow.
C. It has trees that provide oxygen.
D. It has liquid water in the surface.
7
3. What makes planet Earth habitable?
A. It has comfortable distance from the sun.
B. The atmosphere serves as shields from the sun.
C. Only A
D. Both A and B
4. Why is Earth called the “living planet?”
A. It has life mechanism.
B. It has water and atmosphere.
C. It has carbon dioxide in the atmosphere.
D. It has atmosphere that supports oxygen.
5. Which must be provided for an organism to survive in planet Earth?
A. right amount of sunlight and atmosphere
B. right amount of water and carbon
C. Only A
D. Both A and B
6. Planet Earth is considered as “blue planet.” Which of the following best
describes the surface of planet Earth?
A. Earth has atmosphere.
B. Earth has lots of volcano.
C. Earth is covered with red dust.
D. Earth has mostly water on the surface.
7. What is the reason why Earth is different from other planets in the solar
system?
A. Earth is mostly covered in water.
B. Earth has comfortable distance from the sun.
C. Earth has carbon dioxide on its atmosphere.
D. It has approximately same size as that of Venus.
8. Which of the following best describes planet Earth?
A. It has gases.
C. It has rocky core.
B. It supports life.
D. It supports other planet.
9. It was found out that Earth’s surface is covered with water. Approximately,
how many percent of water comprises the Earth?
A. 45% water
C. 60% water
B. 50% water
D. 70% water
10. Earth can support the survival of organisms. What is/are the factor/s that
make/s Earth habitable?
I. atmosphere
III. temperature
II. energy
IV. nutrient
A. I
C. I, II, III
B. I, II
D. I, II, III, IV
11. In order for an organism to survive, nutrients are needed. What are the
nutrients that planet Earth can offer for an organism to exist?
A. Earth has an atmosphere and ozone layer.
B. Earth has both water cycle and nitrogen cycle.
C. Earth has natural activities to circulate nutrients.
D. All of the above
8
12. Many studies have shown similarities of Earth and Venus. What makes Earth
similar with Venus?
A. Earth and Venus have the same orbit.
B. Earth and Venus have the same diameter.
C. Earth and Venus have the same atmosphere.
D. Earth and Venus are of the right size to hold a sufficient atmosphere.
13. What makes human and other living organisms capable to live on Earth?
A. Earth can provide food for the organism.
B. Earth can protect the organism from any possible threat.
C. Earth’s temperature is mostly hot compared to other planets.
D. Earth has the right amount of temperature, water, good atmosphere,
and favorable climate.
14. Planet Earth is considered uniquely different from any other planets in the
Solar system. Which among the given choices correctly answers the
statement?
A. Earth is the only planet that changes structure.
B. Earth is the only planet that turns around in space.
C. Earth is the only planet that is mostly covered with water.
D. Earth is the only planet that is mostly made from rocks.
15. What is the reason why every living thing on Earth has the chance of survival?
A. Earth is covered with 65% water.
B. Earth thick atmosphere consisted mainly of carbon dioxide.
C. Earth has active volcanoes similar with those that are found in Venus.
D. Earth has ozone layer to protect living organisms from harmful
radiation.
Additional Activities
Creating a Planet: Fill up the data needed in your created planet.
My Planet is called _____________________. It is located in the ___________________.
The weather is _____________________It would have __________ kinds of organisms.
The individual who live there are called _________________________.
The individual look like this.
The planet looks like this.
9
10
1. D
2. B
3. B
4. D
5. B
6. D
7. D
8. A
9. D
10.D
11.D
12.D
13.D
14.A
15.D
What's More
Venus has very thick
atmosphere which is
almost dense as
Earth, while Mars has
thin atmosphere.
Venus is hotter than
Earth. Mars is colder
than Earth.
Assessment
1. D
2. D
3. D
4. B
5. D
6. D
7. A
8. B
9. D
10.D
11.D
12.D
13.D
14.C
15.D
Answer Key
What I Know
References
Astronomy, accessed May 29,2020, https://www.astronomy.com:solarsys
Comparison and Contrast of the Earth, Venus ,and Mars, Prezi, accessed May 31,
2020, https://prezi.com/fdx8b8igze26/comparison-and-contrast-of-theearth-venus-and-mars?
Earth: Our Living Planet, NASA Science, accessed May 30, 2020,
https://solarsysytem.nasa.gov
Lunar and Planetary Institute, accessed May 29,2020,
https://www.lpi.usra.edu/education/explore/our_place_/hab_ref_table.pgf?
fbclid=IwAR0PF_PjxWEDwp5hASOZaZY18EG9RKlzgDOeaIb4Xwjey4h2tqJkc
ecH5CE
What Are the Similarities of Venus, Earth, and Mars?,Quora, accessed May 30,
2020, https://www.quora.com/What-are-the-similarities-of-Venus-Earthand-Mars?
Why Is the Earth Habitable?,American Museum of Natural History, accessed May
26, 2020, https://www.amnh.org/exhibitions/permanent/planetearth/why-is-the-earth-habitable?
11
Earth and Life Science
Origin and Structure of the
Earth (Subsystem)
Earth and Life Science
Origin and Structure of the Earth – The Subsystem
First Edition, 2020
Republic Act 8293, Section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Rochelle M. Mercado
Editors:
Melanie I. Samudio, Jocelyn M. Manset
Reviewer:
Jason Ricaforte, Angelica Beriña, Princess Paolah L. De Guzman, Marissa C. Betchaida, Elaine T. Balaogan
Louie L. Alvarez, Gregorio M. De Chavez, Jr, Jocelyn M. Manset, Mario B. Maramot, Job S. Zape Jr
Illustrator:
Ednelinda Robles, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan, Fe M. Ong-ongowan
Merthel M. Evardome, Nadine C. Celindro, Nicolas M. Burgos, Mario B. Maramot, Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
12
Week
1
What I Need to Know
This module was designed and written with you in mind. It is here to help you
master the nature of Biology. The scope of this module permits it to be used in many
different learning situations. The language used recognizes the diverse vocabulary
level of students. The lessons are arranged to follow the standard sequence of the
course. But the order in which you read them can be changed to correspond with
the textbook you are now using.
The module is composed of:
Lesson 1 – The Subsystems of the Earth
After going through this module, you are expected to:
1.
2.
3.
4.
determine the four subsystems of the Earth;
describe the characteristics of each subsystem;
trace the flow of matter and energy in the Earth’s subsystems; and
express one’s internalized role as steward of the four subsystems
concerning the flow of matter and energy.
What I Know
Choose the letter of the best answer. Write the chosen letter on a separate sheet of
paper.
1. Which of the following is NOT one of the four subsystems of the Earth?
A. biosphere
2.
3.
4.
5.
C. water sphere
B. hydrosphere
D. geosphere
All of the waters, including subsurface and atmospheric water comprise the
Earth. Which geological subsystem best label the statement?
A. the geosphere
C. the biosphere
B. the hydrosphere
D. the atmosphere
Earth contains all living organisms including those on the land, in the
water and air. Which subsystem best describes the statement?
A. biosphere
C. atmosphere
B. hydrosphere
D. geosphere
Which subsystem suits the statement, “All living things, including humans,
are part of the immense Earth”?
A. biosphere
C. hydrosphere
B. geosphere
D. atmosphere
What subsystem will network with biosphere for photosynthesis to take
place?
A. atmosphere
C. hydrosphere
13
B. geosphere
D. biosphere
6. Oxygen, water vapor, nitrogen, and other gases help organism to survive .
Which Earth sphere contain these materials?
A. biosphere
C. hydrosphere
B. atmosphere
D. geosphere
7. Which term is used to describe the thin layer of solid rock that makes up
the outermost part of the Earth?
A. core
C. mantle
B. crust
D. biosphere
8. Among the subsystems, which is composed of a mixture of gases that
surrounds the Earth?
A. nitrogen
C. biosphere
B. atmosphere
D. kingdoms
9. The atmosphere of the Earth is composed of ___ nitrogen and _____ oxygen
and other gases.
A. 0% and 100%
C. 78% and 21%
B. 21% and 78%
D. 505 and 505
10. In what subsystem of the Earth are the rocks and mineral found?
A. atmosphere
C. hydrosphere
B. biosphere
D. geosphere
11. What part of the Earth’s sphere make up hydrosphere?
A. glaciers
C. seawater and inland water
B. groundwater
D. all of the above
12. Among all the gases, which gas composed the Earth’s atmosphere?
A. CO2
C. N2
B. He
D. O2
13. Ozone plays an important part for organisms to stay alive. To what sphere
does ozone belong?
A. atmosphere
C. geosphere
B. biosphere
D. hydrosphere
14. Which answer best describes the role of the ozone layer?
A. It traps heat from the sun to heat the planet.
B. It protects the plants and animals on earth from receiving too much
ultraviolet radiation.
C. It cools the earth through the evaporation of water vapor
D. It keeps the oxygen in the atmosphere closest to Earth and the
nitrogen separated in the atmosphere.
15. Which of the following is an example of a human impact of the biosphere?
A. littering
C. water pollution
B. air pollution
D. littering, air and water pollution
14
Lesson 1
Origin and Structure of the Earth –
The Subsystem
Earth is sometimes called the “water planet” or the “blue planet” because seas cover
more than two-thirds of its surface. Earth is the only planet or moon in the solar
system with rain that falls from clouds, runs over the land, and collects in extensive
oceans. It is also the only body we know that supports life. This self- learning
module will help you understand the subsystem of the planet where you stand right
now.
What’s In
Read the statement below and answer the question that follows.
Imagine walking along a rocky coast as a storm blows in from the sea. The wind
whips the ocean into whitecaps, and waves crash onto the shore. Before you have
time to escape, blowing spray has soaked your clothes. A hard rain begins as you
scrambled over the rocks to your car. During the adventure, you have observed the
spheres of the Earth.
List down the terms that are used in the statement that reflects to what made up
the Earth. Categorized them based on the following:
Air
Water
Land
15
With Life
What’s New
Subsystems of the Earth
Analyze and label the given picture. From the picture, create a general concept on
each picture and identify the physical characteristics of the subsystem of the
Earth. Differentiate one with the other.
(A)
(B)
(C)
(D)
What is It
Subsystems of the Earth
The four subsystems of the Earth are:
1. Atmosphere – the gaseous layer above the Earth’s surface primarily
composed of different gases such as nitrogen and oxygen.
2. Biosphere – the zone of the Earth where all forms of life exist. This serves
as the ecosystem of all living and non- living organisms.
3. Geosphere – the solid part of the Earth that consists the entire planet from
the center of the core to the outer crust. It includes core, mantle, and crust
of the Earth.
4. Hydrosphere – the water part of the Earth that includes oceans and
glaciers.
What’s More
Activity 1.1 We are Connected!
According to John Muir, “When one tugs at a single thing in nature, he finds it
attached to the rest of the world.” How is the given diagram related to the said
quote? How does the four subsystem of the Earth connect with each other?
Geosphere
16
What I Have Learned
Subsystems of the Earth
The four subsystems of the Earth are:
1. Atmosphere – it is the gaseous layer above the Earth’s surface, primarily
composed of 78% nitrogen and 21% oxygen. Other gases like argon, carbon
dioxide, carbon monoxide, ozone, and other inert gases made the remaining 1%.
The atmosphere supports life because animals and oxygen, and plants need both
carbon dioxide and oxygen. In addition, the atmosphere supports life indirectly
by regulating climate. Air acts as both a blanket and a filter, retaining heat at
night and shielding from direct solar radiation during the day.
2. Biosphere – the zone of Earth where all forms of life exist: in the sea, on land,
and in water. It is sometimes called as the large ecosystem. This is the zone that
life inhabits. Biosphere is a very thin layer of the earth’s surface.
3. Geosphere – the solid Earth, consisting of the entire planet from the center of
the core to the outer crust. It includes the core, mantle, and crust of the Earth.
4. Hydrosphere – the water part of the Earth which circulates among oceans,
continents, glaciers, and atmosphere. Oceans cover 71% of the Earth and
contain 97.5% of its water.
Earth is a complex system made up of many smaller systems through which matter
and energy are continuously cycled. Energy and matter flow through Earth’s
spheres: geosphere, hydrosphere, atmosphere, and biosphere. Energy flows
through the atmosphere mostly by convection. How does matter and energy flow
across the four subsystems of the Earth? The Earth consists of four subsystems,
across whose boundaries matter and energy flows, the atmosphere (air), biosphere
(living things), hydrosphere (water), and geosphere (land). The atmosphere provides
the geosphere with heat and energy needed for rock breakdown and erosion. The
biosphere receives gases, heat, and sunlight (energy) from the atmosphere. It
receives water from the hydrosphere and a living medium from the geosphere.
What I Can Do
The human population has increased rapidly since the 1700’s. For most of human
history, there were fewer than half-billion people on Earth. In mid- 2009, 6.7 billion
people inhabited our planet. Because of these, extensive pollution is everywhere. As
a student, what can you do to save not only a particular system, but the Earth
itself? Write your answer in the table.
MY ENVIRONMENTAL “TO DO” LIST
1.
17
Assessment
2.
3.
4.
5.
Multiple Choice. Choose the letter of the best answer. Write the chosen letter on a
separate sheet of paper.
1. Earth includes beach grasses, forms of life in the sea, on land, and even in
the air. Which term best describes the statement?
A. atmosphere
C. geosphere
B. biosphere
D. hydrosphere
2. Which system of the Earth is considered as the largest component of the
Earth?
A. atmosphere
C. geosphere
B. biosphere
D. hydrosphere
3. Life is supported by oxygen and carbon dioxide. Which subsystem will best
describe the statement?
A. atmosphere
C. geosphere
B. biosphere
D. hydrosphere
4. Relationship between the complex communities of individual organism is
seen in the different systems of the Earth. What do you call the unit in
nature?
A. ecosystem
C. ground
B. complexity
D. system
5. All of earth’s cycles and spheres are interconnected. Why is this so?
A. because they are interconnected
B. because Earth is where we live in
C. because Earth is the only living planet
D. because every organism has its own function in the Earth
6. What is an example of a connection between atmosphere and geosphere?
A. water
C. mountains
B. nitrogen
D. volcanic eruption release gas
18
7. An example of a connection between atmosphere and hydrosphere is ______.
A. lakes
C. rivers
B. rain
D. rocks
8. From the given choices, which is an example of a connection between
biosphere connecting to atmosphere?
A. Animals eat plants.
C. Animals lie in caves.
B. Animals drink water.
D. Plants produce oxygen.
9. Which among the choices clearly gives an example of connection between
hydrosphere and geosphere?
A. boats transporting goods
B. fish swimming in water
C. water evaporating to make clouds
D. waves eroding rocks on beach
10. All living things, including land and sea made up the Earth. Which term best
described the statement?
A. geosphere
C. atmosphere
B. ozone layer
D. biosphere
11. Which interaction will take place if nitrogen is returned to the soil when dead
plants decompose?
A. biosphere and atmosphere
C. biosphere and geosphere
B. geosphere and atmosphere
D. atmosphere and geosphere
12.
Which interaction best describes carbon dioxide dissolving from the air into
the ocean?
A. atmosphere and hydrosphere
C. atmosphere and geosphere
B. atmosphere and atmosphere
D. atmosphere and biosphere
13. The atmosphere of the Earth is composed of ___ oxygen and _____ nitrogen
and other gases.
A. 0% and 100%
C. 78% and 21%
B. 21% and 78%
D. 50% and 50%
14. What part of geosphere is a thin layer of solid rock that makes up the
outermost part of the Earth?
A. core
C. mantle
B. crust
D. biosphere
15. Ozone plays an important function in every single organism on Earth. To
what sphere does ozone layer belong?
A. atmosphere
C. geosphere
B. biosphere
D. hydrosphere
19
Additional Activities
“Connect Me Spheres”
Procedure: Analyze the interactions of the spheres after the onslaught of Taal
Volcano.
Geo
1. What sphere caused the event?
2. What are the effects of the event on one or more spheres?
3. What is the global implication of the event?
20
21
1. The Earth
consists of four
subsystems,
across whose
boundaries
matter and
energy flows,
the atmosphere
(air), biosphere
(living things),
hydrosphere
(water), and
geosphere
(land). The
atmosphere
provides the
geosphere with
heat and energy
needed for rock
breakdown and
erosion. The
biosphere
receives gases,
heat, and
sunlight
(energy) from
the
atmosphere. It
receives water
from the
hydrosphere
and a living
medium from
the geosphere.
Assessment
16.B
17.C
18.A
19.A
20.D
21.D
22.B
23.D
24.D
25.D
26.C
27.A
28.B
29.B
30.A
What I Know
16.C
17.B
18.D
19.A
20.A
21.B
22.B
23.B
24.C
25.D
26.D
27.C
28.A
29.C
30.A
Answer Key
What's More
References
Earth’s
Four
Subsystems,
Seattle
Pi,
accessed
May
29,
2020,
https://education.seattlepi.com/earth-four-subsystems-work-together4634.html
Earth
System,
Science
Learning
Hub,
accessed
May
30,
https://www.sciencelearn.org.nz/resources/720-earth-system
2020,
Major Geological Subsystem of Earth, Study.Com, accessed May 30, 2020,
https://study.com/academy/lesson/the-4-major-geological-subsystem-ofearth.html?
Thompson, Graham R. et al. 2012. Introduction to Earth Science. Pasig City: Cengage
Learning Asia.
22
Earth and Life Science
Minerals
Earth and Life Science
Minerals
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Josephine P. Jacinto
Editors:
Melanie I. Samudio , Jocelyn M. Manset
Reviewer:
Jason Ricaforte, Angelica Beriña, Job S. Zape Jr., Elaine T. Balaogan, Gregorio M. De Chavez, Jr, Jocelyn M. Manset,
Princess Paolah L. De Guzman, Marissa C. Betchaida, Louie L. Alvarez, Mario B. Maramot,
Illustrator:
Ednelinda Robles, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr. , Elaine T. Balaogan, Merthel M. Evardome
Nadine C. Celindro , Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan, Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
23
Week
1
What I Need to Know
This module was designed and written with you in mind. It is here to help you
master the properties of minerals. The scope of this module permits it to be used in
many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module is divided into two lessons, namely:
Lesson 1 – Minerals and their Characteristics
– Different Properties of Minerals
After going through this module, you are expected to:
1.
2.
3.
4.
identify the examples of minerals;
explain the different characteristics of minerals;
differentiate minerals based on their properties; and
develop awareness on the importance of minerals around us.
What I Know
Choose the letter of the best answer. Write the chosen letter on a separate sheet of
paper.
1. Pyrite is a yellowish mineral that looks like gold and is commonly called
fool’s gold. What is the property of mineral exhibited by pyrite wherein it
reflects light and with metallic look?
A. Color
C. Luster
B. Hardness
D. Streak
2. Quartz can break other than along planes of cleavage. What is the property
of mineral that show this characteristic?
A. Cleavage
C. Hardness
B. Fracture
D. Tenacity
3. Some minerals like mica has surfaces with planes of weak bonds in the
crystals. Thus, its crystals can be peeled like layers of onion. Which is the
property exhibited by mica?
A. Cleavage
C. Hardness
B. Fracture
D. Tenacity
4. Which property refers to the resistance of mineral to scratching?
A. Cleavage
C. Hardness
24
B. Fracture
D. Luster
3. What are the building blocks of rocks and it is mostly found in the
geosphere?
A. minerals
B. soil
C. ore
D. elements
4. In its powdered form, the mineral hematite is reddish. Which mineral
property is described?
A. color
B. luster
C. Streak
D. hardness
7. Which is not a property that can be used to identify a mineral?
A. luster
B. streak
C. hardness
D. opaque
8. What is the property of mineral that reflects light on its surface?
A. Crystal structure
C. streak
B. color
D. luster
9. What is a naturally occurring, inorganic solid that has a definite crystalline
structure and chemical composition?
A. compound
C. mineral
B. crystal
D. rocks
10. During the 1800’s, miners can identify real gold from pyrite through biting
the surface of the mineral. If a bite mark is exhibited, then the said mineral
is considered real gold. What property is tested in this scenario?
A. cleavage
C. hardness
B. luster
D. streak color
11. What is a carbonate mineral that occurs in a different crystal form and is
less common than either calcite or dolomite?
A. aragonite
C. calcite
B. gypsum
D. silica
12. What constitutes the size, shape, and arrangement of mineral grains in a
rock?
A. permeable origin
C. cement
B. porosity
D. texture
13. Which of the following is not a characteristic of a mineral?
A. naturally occurring
C. Organic
B. solid
D. crystal structure
14. What do you call to the tendency for a mineral to break along flat surfaces?
A. cleavage
C. ductility
B. hardness
D. tenacity
25
15. What is the solid form of a mineral produced by a repeating pattern of
atoms?
A. crystal
C. element
B. density
D. fracture
Lesson 1 Minerals
Minerals make up the rocks beneath your feet, the soil that supports plants, and
the deep rock of Earth’s mantle. Any thorough study of Earth must include an
understanding of minerals. But it is not sufficient to study minerals isolated from
the rest of the planet. Rather we can learn more by observing the ways that
minerals interact with other Earth systems.
What’s In
This module contains activities that will enhance the teaching -learning process
among learners about the minerals. It deals with the characteristics of minerals and
the properties exhibited by the minerals. As the learners answer the questions they
will be able to explore and understand the concepts about minerals. Moreover, they
will develop awareness on the importance of minerals.
What’s New
Name the following pictures below. List down the usage of these object in our daily
activities. What do the objects presented below imply?
1.
2.
26
3.
4.
5.
We are using these products made from minerals daily. Graphite is the mineral used
in wooden pencil. Halite is the mineral found in salt. Your cellphone is made up of
different minerals. The cars that we drive, the roads that we travel, the building that
we live in, are some examples of products derived from minerals.
Characteristics of Minerals
Arrange the jumbled letters to find the appropriate criteria to determine whether a
material is classified as a mineral or not.
1. N L T L A U R Y
N G O I
R
U
C C
___________________________- It is a product of Earth’s natural processes.
2. C A I I R O G N
___________________________- It must be product of Earth’s physical
processes.
3. S O U E N E G O M O H
D I L O S
___________________________- have definite shape and volume.
4. E N I L L A T S Y R C E S R T R U C U T
__________________________- atoms are arranged in order of
increasing pattern.
27
5. L M C E H A I
NOITOCMOPSI
__________________________- represented by chemical formula
What is It
What are Minerals?
Minerals are the building blocks of rocks. Mineralogists use the criteria to
determine whether a material is classified as a mineral or not.
Characteristics of Minerals
1.
2.
3.
4.
5.
naturally occurring- a product of Earth’s natural processes
inorganic- it must be product of Earth’s physical processes.
homogeneous solid- minerals should have definite volume and rigid shape
definite chemical composition—represented by a chemical formula
orderly
crystalline structure- atoms of minerals are arranged in an
orderly and repeating pattern
Properties of Minerals
To identify minerals, mineralogists observe the following properties:
a. Color - mineral’s color may change depending on the surface.
b. Streak - color of mineral in powdered form.
c. Hardness - minerals resistance to scratching
Mohs Scale of Hardness (Diamond is the Hardest with a scale of 10)
Diamond
Corundum
Topaz
Quartz
Orthoclase
Apatite
Fluorite
Calcite
Gypsum
Talc
d. Cleavage - mineral’s resistance to being broken and fracture
e. Crystalline structure or habit
f. Diaphaneity/amount of transparency - ability to allow light to pass
through it. This is affected by chemical makeup of the mineral sample.
g. Luster - how light is reflected off a surface
h. Tenacity - describes the minerals reaction to stress.
Brittleness- a mineral turns into powder
28
Malleability a mineral can be flattened by pounding with a hammer.
Ductility- A mineral can be stretched into wire.
Flexible but inelastic-Minerals are bent but they remain in the new
position.
Flexible and elastic- Minerals are bent, and they bring back to their
original position.
Sectility- ability of minerals to be sliced by a knife.
Prepare a list of minerals based on the Mohs Scale of Hardness and identify some
products that make use of these minerals.
Minerals
Products that contain the Mineral.
1. Diamond
2.Corundum
3.Topaz
4.Quartz
5.Orthoclase
6 Apatite
7.Fluorite
8.Calcite
9. Gypsum
10. Talc
29
What’s More
Understanding Science Words
The pictures below show the common minerals and their properties or uses.
Identify other properties exhibited by the minerals. Choose your answer from the
given choices.
BRITTLENESS
MALLEABILITY
DUCTILITY
LUSTER
SECTILITY
1. All true minerals can be drawn into wires _________________________
2. Overall sheen of mineral ___________________________________________
3. A mineral can be hammered /flattened _____________________________
4. A mineral can be cut by a knife ___________________________________
30
5. A mineral can be turned into powder________________________________
What I Have Learned
Fill in the Blanks
Identify the prominent properties exhibited by the following minerals. Fill in the
blanks to form the appropriate term that best fits the described mineral property.
1. L __ __ T __ R - a manner by which mineral reflects light.
Pyrite - a. k a. fool’s gold
2. S __ R __ __ K - color of mineral in powdered form.
Hematite- both types leave the same powder
3. __ L __ __V __ G __ - tendency of mineral to break along flat surfaces
Mica crystal can be peel like layers of onion
31
4. __ R __ C __U __ __- the manner breaks other than along planes of
cleavage.
Quartz creates smooth, curved surfaces
5. H __R __ __ __S__ - resistance of mineral to scratching and it is the
most commonly used property for identifying minerals.
Diamond has a scale of 10
HARDNESS
FARCATURE
STREAK
LUSTER
CLEAVAGE
Matching Type
Match the properties of minerals in column A with the description of mineral
properties in column B.
Column A
Column B
_____1. Mohs hardness scale A. describes the mineral reaction to stress
_____2. Sectility
B. true color of mineral
_____3. Streak
C. a ranking of mineral from softest hardest
_____4. Crystal
D. ability of mineral to be cut by knife
_____5. Tenacity
E. repeating pattern in minerals in solid
32
What I Can Do
List some of the uses of minerals around us.
Minerals
Uses
1.Halite
Mineral
found
in
preservatives
2
table
salt;as
3
4
5
Reflect Upon
Upon knowing the value of minerals in our everyday life, as a student how can you
help in conserving and preserving the natural sources of these minerals? (For
example, graphite is a mineral found in pencil).
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
33
Assessment
Multiple Choice. Choose the letter of the best answer. Write the chosen letter on a
separate sheet of paper.
1. Pyrite is a yellowish mineral that looks like gold and is commonly called
fool’s gold. What is the property of mineral exhibited by pyrite wherein it
reflects light and with metallic look?
A. Color
C. Luster
B. Hardness
D. Streak
2. Quartz can break other than along planes of cleavage. What is the property
of mineral that show this characteristic?
A. Cleavage
C. Hardness
B. Fracture
D. Tenacity
3. Some minerals like mica has surfaces with planes of weak bonds in the
crystals. Thus, its crystals can be peeled like layers of onion. What is the
property exhibited by mica?
A. Cleavage
C. Hardness
B. Fracture
D. Tenacity
4. Which property refers to the resistance of mineral to scratching?
A. Cleavage
C. Hardness
B. Fracture
D. Luster
5.What are the building blocks of rocks and it is mostly found in the
geosphere?
A. minerals
B. soil
C. ore
D. elements
6.In its powdered form, the mineral hematite is reddish. Which mineral
property is best described?
A. color
B. luster
C. Streak
D. hardness
7. Which is not a property that can be used to identify a mineral?
A. luster
B. streak
C. hardness
D. opaque
8. What is the property of mineral that reflects light on its surface?
A. Crystal structure
C. streak
B. color
D. luster
34
9. What is a naturally occurring, inorganic solid that has a definite crystalline
structure and chemical composition?
A. compound
C. mineral
B. crystal
D. rocks
10. During the 1800’s, miners can identify real gold from pyrite through biting
the surface of the mineral. If a bite mark is exhibited, then the said mineral
is considered real gold. What property is tested in this scenario?
A. cleavage
C. hardness
B. luster
D. streak color
11. What is a carbonate mineral that occurs in a different crystal form and is
less common than either calcite or dolomite?
A. aragonite
C. calcite
B. gypsum
D. silica
12. What constitutes the size, shape and arrangement of mineral grains in a
rock?
A. permeable origin
C. cement
B. porosity
D. texture
13. Which of the following is not a characteristic of a mineral?
A. naturally occurring
C. Organic
B. solid
D. crystal structure
14. What do you call tendency for a mineral to break along flat surfaces?
A. cleavage
C. ductility
B. hardness
D. tenacity
15. What is the solid form of a mineral produced by a repeating pattern of
atoms?
A. crystal
C. element
B. density
D. fracture
35
Additional Activities
Putting together
Directions: Complete the concept map below.
MINERALS
PROPERTIES
1. Shows the true color
2. Resistance to scratching
3.
Can be flatten into thin sheets
4. Show how light is reflected on the surface
5. Can be drawn into wires
Brainstorming
Assume you are a mineralogist that discovered a new type of mineral. To inform not
only the academe but also the common people, you are then tasked to make an
infographic that will state its characteristics, properties, and significance (whether
economic, health and scientific). Present these important data through a concept
map.
36
Finding the Perfect Match
Take at least 5 photos of minerals that are found in our day to day living. Identify
the said minerals and state their unique characteristics and significance.
Name: ______________________________
Name: ____________________________
Characteristics: ______________________
Characteristics: ___________________
Significance: _________________________
Significance: ______________________
Name: ______________________________
Name: ____________________________
Characteristics: _____________________
Characteristics: ___________________
Significance: _________________________
Significance: ______________________
37
Name: _______________________________
Name: ____________________________
Characteristics: ______________________
Characteristics: ___________________
Significance: _________________________
Significance: ______________________
38
39
1. Luster
2. Streak
3. Cleavage
4. Fracture
5. Hardness
Matching Type
1. C
2. D
3. B
4. E
5. A
What's More
1.
2.
3.
4.
5.
Ductility
Luster
Malleability
Sectility
brittleness
Pre Test/Post test
1.
2.
3.
4.
5.
C
B
A
C
A
6. C
7. D
8. D
9. C
10.C
11.A
12. D
13.C
14.A
15 A
What’s New
A.1. Pencil
2.Table salt
3.Cellphone
4.Car
5.Bridge
B 1 Naturally occuring
2.Inorganic
3.Homogeneous
solid
4.crystalline
structure
5,chemical
composition
Answer Key
What I Have Learned
40
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
C
B
A
B
A
C
D
D
C
C
A
D
C
A
A
Additional activities
1. Streak
2. Hardness
3. Malleability
4. Luster
5. Ductility
What I can do
1. Answer may vary.
Answer Key
Post Test
References
Thompson G.R. and Turk J. (2012).Introduction to Earth Science. Cengage
Learning Asia PTE Ltd.(Philippine Branch)
Religioso, T. F. and Vengco, L. G.(2016) You and the Natural World: Earth and
Life Science. Phoenix Publishing House
Olivar II, J.S., Rodolfo, R.S. and Cabria, H.B. (2016) Exploring Life Through
Science Series: Earth Sence. Phoenix Publishing House
41
Earth and Life Science
Rocks
Earth and Life Science
Rocks
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these
materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Josephine P. Jacinto
Editors:
Melanie I. Samudio, Jocelyn M. Manset
Reviewer:
Jason Ricaforte, Angelica Beriña, Job S. Zape Jr. , Elaine T. Balaogan, Gregorio M. De Chavez, Jr
Princess Paolah L. De Guzman, Marissa C. Betchaida, Louie L. Alvarez, Jocelyn M. Manset , Mario B. Maramot
Illustrator:
Ednelinda Robles, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral , Job S. Zape Jr , Elaine T. Balaogan, Rosemarie D. Torres, Ernesto D. Lindo , Dolorosa S. De Castro
Cristeta M. Arcos , Fe M. Ong-ongowan
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
42
Week
2
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the properties of minerals. The scope of this module permits it to be used in many
different learning situations. The language used recognizes the diverse vocabulary
level of students. The lessons are arranged to follow the standard sequence of the
course. But the order in which you read them can be changed to correspond with
the textbook you are now using.
The module covers:
Lesson 1 – Types of Rocks and their Properties
After going through this module, you are expected to:
1. identify the three types of rocks;
2. classify rocks as to igneous, sedimentary and metamorphic rocks; and
3. appreciate the importance of rocks in our daily life.
What I Know
Choose the letter of the best answer. Write the chosen letter on a separate sheet of
paper.
1. Rocks vary in color, size, texture and shape. They are classified based
on how they were formed. Which of the following deals with the study of
rocks?
A. Biology
B. Geology
C. Paleontology
D. Petrology
2. Halite is made when a body of seawater becomes closed off and evaporates
and salt precipitates out and is deposited as crystallized halite. What type of
sedimentary rock is formed?
A. Clastic
B. Chemical
C. Organic
D. Pyroclastic
3. Igneous rock is divided into two groups, extrusive and intrusive Extrusive
igneous rocks form when magma makes its way to its surface as lava and the
cools forming rocks. Which will be the characteristics of the crystals?
A. Crystals are coarse grained.
B. Crystals are fine grained.
C. Crystals are very large.
D. Crystals are phaneritic
4. Regional metamorphism occurs due to changes
in pressure and
temperature over a large region of the crust. It may happen when rock is
buried deep below the surface or where pieces of the Earth’s crust collide.
Which is a metamorphic rock?
A. Breccia
B. Conglomerate
C. Marble
D. Sandstone
43
5. Igneous and metamorphic rock can be buried and undergo tremendous
heating and stress. What is the process of transformation of one rock type
into another?
A. Compaction
B. Lithification
C. Metamorphism D. weathering
6. What type of rocks are formed from sediments over long period of time?
A. Igneous Rocks
C. Metamorphic Rocks
B. Sedimentary Rocks
D. Minerals
7. This refers to type of rock that was heated and compressed over time.
A. Igneous
C. Metamorphic
B. Sedimentary
D. All are correct
8. What is the natural process that causes one kind of rock to change into another
kind?
A. weathering
B. rock cycle
C. Sediments
D. Metamorphism
9. A rock that forms when magma hardens beneath Earth’s surface is termed as:
A. Intrusive metamorphic rock
B. Extrusive sedimentary rock
C. Intrusive igneous rock
D. Extrusive igneous rock
10. Which of the following is an example of an igneous rock?
A. Limestone
B. Coal
C. Sandstone
D. Granite
11. Which of the following represents the correct order of the processes
responsible for the formation of sedimentary rocks?
A. Erosion, weathering, compaction, cementation, deposition
B. Compaction, cementation, deposition, weathering, erosion
C. Deposition, cementation, compaction, erosion, weathering
D. Weathering, erosion, deposition, compaction, cementation
12. A student obtained a cup of quartz sand from a beach. A saltwater solution is
poured into the sand and allowed to evaporate. The mineral residue from salt
water solution cements the sand grains together, forming a material that is
most likely an:
A. extrusive igneous rock
B. intrusive igneous rock
C. metamorphic rock
D. sedimentary rock
44
13. Which of the following is true about rocks?
A. Rocks are composed of only one mineral.
B. Most rocks are a mixture of minerals.
C. Rocks do not contain minerals.
D. Coal is not considered a rock.
14. What is the type of rock formed from lava that cools quickly that results to
finer grain and smaller size of crystals?
A. Extrusive igneous rock
B Intrusive igneous rock
C. Sedimentary rock
D. Metamorphic rock
15. Fossils are found on this type of rocks.
A. Extrusive igneous rock
B. Intrusive igneous rock
Lesson 2
C. Sedimentary rock
D. Metamorphic rock
Rocks
Petrology is the scientific study of rocks. Rocks are combined aggregation of
minerals. Petrologist classified rocks based on how they were formed. In general,
rocks are classified as igneous, sedimentary, and metamorphic rock.
What’s In
This module contains activities that will enhance the teaching-learning process
among learners about the minerals. It deals with the characteristics of rocks and the
properties exhibited by the rock. As the learner answers the questions, they will able
to classify and understand the concepts about three types of rocks. They will
understand the process of their formation. Moreover, they will develop awareness on
the importance of rocks to our daily life.
45
What’s New
Word Cryptogram
Directions: To come up with the correct answer for each number, unscramble the
letters by placing the correct letter sequence in the shaded box. Use number boxes
to complete the answer to the riddle below.
E M N I S T D A Y E R
2
E M A
I
H T P C M E R
4
G E
N O S U C
O R
I
K
3
V
A
C N
I
O L
6
C
A
S
I
L
T C
1 5
1 2
3 4 5 6
Riddle: the layers of sediments that accumulated and carry the records of the Earth’s
history.
46
What is It
Earth is a solid rock to a depth of 2,900 kilometers, where mantle meets the liquid
outer core. A rock is a naturally occurring solid aggregate of one or more minerals.
The aggregate minerals forming the rocks are held together by chemical bonds.
Grains can be different in color, texture, and sizes. Geologists then group rocks into
three categories based on how the rocks form: igneous sedimentary and
metamorphic rock. Petrology is the scientific study of rocks. Petrologists classify
rocks based on how they were formed.
Three types of Rocks
Igneous- formed from hardening and crystallization of magma or molten material
that originates deep within the earth.
Two types of igneous rock:
A. Extrusive/Volcanic rock - forms when magma makes its way to Earth’s surface
as lava and then cools. The crystals are very small (fine grained) since the cooling
process is fast.
B. Intrusive/Plutonic - It cools slowly beneath the Earth surface and are created
by magma. The intrusive igneous rocks have very large crystals (coarse grained).
Igneous rocks are classified based on
1. Composition
FELSIC - light in color; feldspar and silicates
MAFIC - dark in color; made up of magnesium and iron
INTERMEDIATE – between mafic and felsic
ULTRAMAFIC - very dark color
2. Texture- overall appearance of rock
Aphanistic - fine grained
Phaneritic- coarse grained
Porphyritic- large crystals with small crystals
Glassy- non-ordered solid from rapid quenching
Pyroclastic- composite of ejected fragments
Examples:
Obsidian, pumice, basalt, granite, diorite, gabbro
47
Metamorphic - forms from pre-existing rocks: either metamorphic, igneous,
sedimentary
Examples: Quartzite, marble, slate, phyllite
Metamorphism - transformation of one rock type into another.
2 types of metamorphism
1. Regional-due to changes in pressure and temperature over large region of
the crust
2. Contact-mainly by heat due to contact with magma
Classification:
a. Texture - refers to the size arrangement ad grains within the rock.
b. Foliation - any planar arrangement of mineral grains or structural features
within the rock.
*foliated - appeared banded or layered, contains crystals Example: mica
Non-foliated - made up of only few minerals
Sedimentary rocks provide information about surface conditions that existed in the
Earth’s past.
Particles of sand, shells, pebbles, and other fragments of materials called
sediments, accumulate in layers and over long period of time harden into rocks.
Compaction-due to increase of pressure of layered sediments it bind together to
form the sedimentary rocks.
Three types of sedimentary rocks
a. Clastic Sedimentary rock - formed from accumulation of clasts: little pieces of
broken rocks and shells. Examples: conglomerate, breccia, sandstone, shale
b. Chemical - formed when dissolved minerals precipitate from a solution.
48
Example: Halite - formed when a body of seawater becomes closed off and
evaporates.
c. Organic - rocks formed from the accumulation of animal debris
Example: Coal - composed of organic matter in the form of plants fragments.
Identify and classify the types of rocks below as to igneous, sedimentary, and
metamorphic rock.
1. ___________________
2. ___________________
3. ___________________
4. ___________________
5. ___________________
Collect at least five rock samples in your place and take a photo of the samples.
Describe the characteristics of each rock depending on their appearance, texture,
49
color, and layers (or bands). Then classify them as to igneous, sedimentary, or
metamorphic rock.
Type of Rock: _________________________________________
Description: ___________________________________________
Importance: ___________________________________________
Type of Rock: __________________________________________
Description: ___________________________________________
Importance: ___________________________________________
Type of Rock: __________________________________________
Description: ___________________________________________
Importance: ___________________________________________
Type of Rock: __________________________________________
Description: ___________________________________________
Importance: ___________________________________________
Type of Rock: __________________________________________
Description: ___________________________________________
Importance: ___________________________________________
50
What’s More
Understanding Science Words
Crossword Puzzle
Answer the questions below that refer to the terms about the characteristics
different types of rocks.
10O
9P
1C
C
7
A
2C
6
E
8C
3
M
I
4
R
5P
ACROSS
1.rocks formed from accumulation of clasts little pieces
2. formation of igneous rocks due to hardening of magma
3. transformation of one rock type into another
4. combined aggregation of minerals
5. composed of ejected fragments
6. a.k.a. volcanic rock
7. fine grained rock
DOWNWARD
8. sediments bind together due to increase in pressure
9. coarse grained
10. sedimentary rocks formed from plants and animals.
51
and
What I Have Learned
Fill in the table below by providing basic information about the types of rocks. You
may refer to the words in the box below.
Igneous
Sedimentary
Metamorphic
Types
Examples
Process of
formation
WORD LISTS
Lithification
pumice
clastic
Metamorphism
sandstone
intrusive
Cooling
andesite
extrusive
Cementation
slate
non- clastic
Deposition
metamorphism
marble
contact
Fill in the Venn Diagram to determine the similarities and differences of the three
types of rocks.
52
What I Can Do
Reflect upon:
Rocks are all around us. It is used for building materials, cars, roads, and
appliances. As a senior high school student, how can you promote the
sustainable development in utilizing these resources? Give some suggestions.
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
____________________.________________________________________________________
_____________________________________________________________________________
____________________.________________________________________________________
_____________________________________________________________________________
____________________.________________________________________________________
_____________________________________________________________________________
Using the Internet, research three rocks of different types (igneous, sedimentary,
and metamorphic) and state their respective economic and medical significance
in our present society.
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
____________________.________________________________________________________
_____________________________________________________________________________
____________________.________________________________________________________
_____________________________________________________________________________
____________________.________________________________________________________
_____________________________________________________________________________
53
Assessment
Multiple Choice. Choose the letter of the best answer. Write the chosen letter on a
separate sheet of paper.
1. Petrologist classifies rocks based on how they were formed. What is the
branch that deals with the study of rocks?
A. Biology
B. Geology
C. Paleontology
D. Petrology
2. Halite is made when a body of seawater becomes closed off and
evaporates and salt precipitates out and is deposited as crystallized halite.
What type of sedimentary rock is formed?
A. Clastic
B. Chemical
C. Organic
D. Pyroclastic
3. Igneous rock is divided into two groups, extrusive and intrusive Extrusive
igneous rocks form when magma makes its way to its surface as lava and
the cools forming rocks. Which of the following will be the characteristics of
the crystals?
A. Crystals are coarse grained.
B. Crystals are fine grained.
C. Crystals are very large.
D. Crystals are phaneritic
4. Regional metamorphism occurs due to changes in pressure and temperature
over a large region of the crust. It may happen when rock is buried deep below
the surface or where pieces of the Earth’s crust collide. Which is a
metamorphic rock?
A. Breccia
B. Conglomerate
C. Marble
D. Sandstone
5. Igneous and metamorphic rock can be buried and undergo tremendous
heating and stress. What is the process of transformation of one rock type into
another?
A. Compaction
B. Lithification
C. Metamorphism
D. weathering
6. What type of rocks are formed from sediments over long period of time?
A. Igneous Rocks
C. Metamorphic Rocks
B. Sedimentary Rocks
D. Minerals
7. This refers to a type of rock that was heated and compressed over time.
Which best fits the description?
A. Igneous
B. Metamorphic
C Sedimentary
D. All are correct
8. What is the natural process that causes one kind of rock to change into
another kind?
A. weathering
B. rock cycle
C. Sediments
D. Metamorphism
54
9. A rock that forms when magma hardens beneath Earth’s surface is called an:
A. Intrusive metamorphic rock
B. Extrusive sedimentary rock
C. Intrusive igneous rock
D. Extrusive igneous rock
10. Which of the following is an example of an igneous rock?
A. Limestone
B. Coal
C. Sandstone
D. Granite
11. Which of the following represents the correct order of the processes responsible
for the formation of sedimentary rocks?
A. Erosion, weathering, compaction, cementation, deposition
B. Compaction, cementation, deposition, weathering, erosion
C. Deposition, cementation, compaction, erosion, weathering
D. Weathering, erosion, deposition, compaction, cementation
12. A student obtain a cup of quartz sand from a beach. A saltwater solution is
poured into the sand and allowed to evaporate. The mineral residue from salt
water solution cements the sand grains together, forming a material that is
most likely an:
A. Extrusive igneous rock
C. sedimentary rock
B. intrusive igneous rock
D. metamorphic rock
13. Which of the following is true about rocks?
A. Rocks are composed of only one mineral.
B. Most rocks are a mixture of minerals.
C. Rocks do not contain minerals.
D. Coal is not considered a rock.
14. What is the type of rock formed from lava that cools quickly that results to finer
grain and smaller size of crystals?
A. Extrusive igneous rock
B Intrusive igneous rock
C. Sedimentary rock
D. Metamorphic rock
15. Fossils are found on this type of rocks.
A. Extrusive igneous rock
B. Intrusive igneous rock
C. Metamorphic rock
D. Sedimentary rock
55
Additional Activities
A. Complete the concept map using the words below.
Rocks can be classified on how they were formed
________________
________________
________________
Forms from cooling
and solidification of
magma
Formed from
compaction and
cementation
Rocks change due to
temperature and
pressure change
________________
________________
________________
Compacted sediments
classified by size
Heat
________________
________________
________________
Lava cools quickly
Evaporates,
precipitate, biological
matter
Pressure
Magma cools slowly
Metamorphic
Clastic
Contact metamorphism
Sedimentary
Extrusive
Regional Metamorphism
Non- Clastic
Igneous
Intrusive
56
Additional Activities
B. Fill in the missing word/term to complete the rock cycle. You may refer to the
box below.
ROCK CYCLE
3.
Weathering,
erosion,
transport and
deposition
4.
5.
2.
1.
Burial and
extreme heat
MAGMA
Igneous
Metamorphic
Sedimentary
Heat and/or pressure
Minerals
Metamorphism
Thermal Expansion
Intrusion/eruption
57
58
1
2
P
H
S T A
N
6
E
R
I
3M E
T
I
4
R O C
L
L
I
X
T
R U S
A M O R P H
E
M
M
E
A
T
G
I
E
G
N
N
I
A
4
O
E
What’s New
V A C N
V O L C
C
C
A
L
S
A
I
S
1
D
N
H
M
T
O
P
R
S
O
U
U
C
S
I
A
6
L
T
5
O
N
L
O
T
I
C
C
A
T
2
C
P
Y
A
E
R
E
I
R
C
O
R
3
R
O
I
C
N
V E
I
S
R O C L A S T
C
O
M
P
A
C
T
I C
O
N
Pre Test
R
Y
M
H
O
K
P Y
T
E
I
I
8
5
What's New
Word Cryptogram 1,2
E M N I S
S E D I M
Z A T
K
K
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
D
B
B
C
C
B
C
B
C
D
D
D
B
A
C
Answer Key
O
R
G
A
N
L 7A S T I C
2
P
C R Y
H
A
N
E
T
I
C
59
Assessment /Post Test
1. D
2. B
3. B
4. C
5. C
6. B
7. C
8. B
9. C
10. D
11. D
12. C
13. B
14. A
15. C
Additional Activities
A.
Igneous
Intrusive
Extrusive
B.
Sedimentary
Clastic
Non- Clastic
Metamorphic
Contact
Regional
1. Intrusion/eruption
2. Igneous
3. Sedimentary
4. Heat and/or Pressure
5. Metamorphic
What I have Learned?
What I can do?
Igneous
Sedimentary
Metamorphic
Types
Intrusive
extrusive
Clastic
Non- Clastic
Contact
Regional
Metamorphism
Examples
Obsidian,
granite
Basalt
pumice
Breccia,
conglomerate
Limestone
sandstone
Process
involved
Crystallization
cooling
Compaction
Lithification
cementation
metamorphism
1. Chalk/Sedimentary
2. Sandstone,
Sedimentary
3.Schist, Metamorphic
4.Limestone,
Sedimentary
5. Gabro, Sedimentary
References
Olivar II, J.S., Rodolfo, R.S. and Cabria, H.B. (2016) Exploring Life Through Science
Series: Earth Sence. Phoenix Publishing House
Religioso, T. F. and Vengco, L. G.(2016) You and the Natural World: Earth and Life
Science. Phoenix Publishing House
Thompson G.R. and Turk J. (2012).Introduction to Earth Science. Cengage
Learning Asia PTE Ltd.(Philippine Branch)
60
Earth and Life Science
Exogenic Processes
Earth and Life Science
Exogenic Processes
First Edition, 2020
Republic Act 8293, Section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Rhodora G. Bautista, Josephine P. Jacinto
Editors:
Melanie I. Samudio, Jocelyn M. Manset
Reviewer:
Jason Ricaforte, Angelica Beriña, Job S. Zape Jr., Elaine T. Balaogan,
Princess Paolah L. De Guzman, Marissa C. Betchaida, Louie L. Alvarez
Jocelyn M. Manset, Mario B. Maramot,
Illustrator:
Ednelinda Robles, Lovely Joy La Rosa, Charles Erick A. Jusay,
Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan
Merthel M. Evardome, Nadine C. Celindro, Nicolas M. Burgos
Mario B. Maramot, Fe M. Ong-ongowan, Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
61
Week
2
What I Need to Know
This module was designed and written with you in mind. It is here to help you
master interaction and interdependence in the ecosystem. The scope of this module
permits it to be used in many different learning situations. The language used
recognizes the diverse vocabulary level of students. The lessons are arranged to
follow the standard sequence of the course. But the order in which you read them
can be changed to correspond with the textbook you are now using.
The module covers:
Lesson 5 – Exogenic Processes
After going through this module, you are expected to:
1. describe how rocks undergo weathering;
2. identify the agents of erosion; and
3. explain how the products of weathering are carried away by erosion
and deposited elsewhere.
What I Know
Choose the letter of the best answer. Write the chosen letter on a separate sheet of
paper.
1. A plant is growing into the base of a stone monument and creating a crack on
it? This is an example of _____________.
A. thawing
B. freezing
C. chemical weathering
D. mechanical weathering
2. Some minerals dissolve rapidly in water while others do not. If you put crystals
of halite or rock salt in water, the crystals rapidly dissolve to form a solution.
What is the type of chemical weathering exhibited by the mineral halite?
A. abrasion
B. oxidation
C. dissolution
D. hydrolysis
3. Stalactites and stalagmites on caves are a popular attraction. These were formed
through deposition of calcium carbonate and other minerals. What type of
weathering occurred during the process?
A. freezing and thawing
B. chemical weathering
C. mechanical weathering
D. thermal and pressure change
62
4. Water reacts with one mineral to form a new mineral that has water part of
crystal structure. A mineral feldspar, the most abundant on the Earth’s crust
weathers by the process of chemical weathering. What is the process that is
exhibited by the feldspar?
A. oxidation
B. hydrolysis
C. dissolution
D. pressure-release fracturing
5. Rusting is an example of chemical weathering. What is the process involved?
A. pressure-release fracturing
B. dissolution
C. hydrolysis
D. oxidation
6. Rocks and sand collide with one another when currents or waves carry them
along a stream or beach. During these collisions, their sharp edges and corners
wear away and the particles become rounded. What is the mechanical
weathering of rocks by friction and impact?
A. abrasion
B. oxidation
C. hydrolysis
D. dissolution
7. Which of the following human activities result in moving the sediments from one
place to another?
A. cultivating soil and gardening
B. developing new athletic field
C. building a highway
D. all of the above
8. Which of the following is NOT an agent of erosion?
A. glacier
C. wind
B. gravity
D. rocks
9. All of the following are the advantages of wind barrier such as row of trees along
the edge of field EXCEPT:
A. conserve moisture
B. trap the blowing wind
C. protect crops from the effects of wind
D. increase the effects of wind erosion.
10. The process by which rocks on the earth’s surface breaks down or changes its
composition is called _____________.
A. erosion
C. weathering
B. deposition
D. mass wasting
63
11. Which of the following processes does NOT cause physical weathering?
A. oxidation
B. freezing and thawing
C. burrowing of animals
D. temperature and pressure
12. Which of the following processes does NOT cause chemical weathering?
A. oxidation
C. dissolution
B. hydrolysis
D. temperature
13. Which of the following processes of chemical weathering occur in the formation
of stalactites and stalagmites?
A. oxidation
B. hydrolysis
C. dissolution
D. all of the above
14. What statement is NOT correct about dissolution?
A. It happens when elements react with atmospheric oxygen.
B. Rocks and minerals dissolve rapidly when water is either acidic or basic.
C. Limestone composed of calcite is weathered and develops caves through
time.
D. The crystal of halite dissolves rapidly and completely in water to form a
solution.
15. Soil is an essential component of the earth’s crust. What is the composition of
the soil?
A. a mixture of clay, dust, and sand
B. a mixture of silt, dust, sand, and water
C. a mixture of rock, dust, sand, water, and gas
D. a mixture of grains, organic matter, H2O, and gas
Lesson 5
Exogenic Process
The earth’s surface is composed of water and landmasses. The solid portion is made
out of rocks and minerals that could experience changes either physically or
chemically. The weathered materials are transported by different agents from one
place to another and will settle down in a particular area. These progressions that
happen is achieved by forms called exogenic processes. It includes weathering,
erosion, and deposition.
64
What’s In
Activity 1
Organize the disordered letters. Describe each term briefly.
S K O R C
E I
E I
N A
P
O
I
G
N O S U
M N D S E T
O T G D
I
C M O N
I
S
I
I
O
N
T
S
T E R
S D E
What’s New
Activity 2
Weathering is the process of disintegration (physical) and decomposition (chemical)
of rocks. Weathering is a process of breaking down rocks into small particles such
as sand, clay, gravel and other fragments. There are two types of weathering:
mechanical weathering and chemical weathering. This activity will allow learners to
differentiate physical changes from chemical changes.
Learners will follow the following instructions:
1. Prepare the needed materials: two pieces of paper and match.
2. Tear one paper, observe, and record your answer.
3. Burn the other paper (with teacher supervision), observe, and record your
answer.
4. Based on your observation, differentiate the changes after tearing and
burning.
65
Tearing of paper
Burning of paper
Before
Before
After
After
Activity 3
Spot the difference/s.
What can you say about the image? Do you see any difference?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
_
What is It
Mechanical weathering or physical weathering is the breakdown of rocks into pieces
without any change in its composition. In this process, the size and shape of rocks
changes and this occurs because of the following factors shown in the table below.
Factors
Description
Pressure
Due to tectonic forces, granite may rise to form mountain range.
After the granite ascends and cools, the overlying rocks and
sediments may erode. At the point when the pressure diminishes,
the rock expands, cools, and became brittle and fractured.
Temperature
Rocks expand and are fractured when expose to high temperature.
However, if the temperature drops to 0°C (freezing point of water),
it also expands and causes fracture.
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Frost
Wedging
Generally, rocks have fracture in its surface and when water
accumulates in the crack and at that point freezes, the ice expands
and breaks the rock apart.
Abrasion
The breakdown of rocks is caused by impact and friction. This
primarily occurs during collision of rocks, sand, and silt due to
current or waves along a stream or seashore causing sharp edges
and corners to wear off and become rounded.
Organic
Activity
The roots grow causing penetration into the crack, expand, and in
the long run, break the rock.
Human
Activities
Activities such as digging, quarrying, denuding forests and
cultivating land contribute to physical weathering.
Burrowing
Animals
Animals like rats, rabbits and squirrels excavate into the ground
to create a space for habitation.
Activity 4
I.
Identify the factors of physical weathering shown in each picture.
1. ____________________________________
2. ____________________________________
3. ____________________________________
In chemical weathering, there are changes in the composition of rocks due to the
chemical reactions presented below.
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Chemical
Reactions
Description
Dissolution
It occurs in specific minerals which are dissolved in water.
Examples of these minerals are Halite (NaCl) and Calcite (CaCO 3).
The formation of stalactites and stalagmites in caves are brought
about by this chemical reaction.
Hydrolysis
Rock-forming minerals like amphibole, pyroxene, and feldspar
react with water and form different kinds of clay minerals.
Oxidation
It is the response of oxygen with minerals. If the iron oxidizes, the
mineral in rocks decomposes. Rusting is an example of this
chemical reaction.
II. Analyze each picture. Identify the chemical reaction that causes chemical
weathering.
4. ____________________________________
5. ____________________________________
What’s More
Weathering is an important process in the formation of soil. Soil is a mixture of
grains, organic matter, H2O, and gas.
Plants, animals, and humans play an important role in the erosional process.
Erosion is the separation and removal of weathered rocks due to different agents
like water, wind, and glacier that causes transportation of the material to where
they are deposited.
Activity 5
Answer the following questions:
1. How do animals cause erosion?
_____________________________________________________________________________
68
2. How do human activities affect the rate of erosion?
_____________________________________________________________________________
Activity 6
Illustrate the agents of erosion and explain how each of them causes erosion.
C. __________________
B. __________________
A. __________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
The movement of sediments downslope under the influence of gravity is called mass
wasting. The example of this are fall, slide, avalanche, and flow. On the other hand,
deposition is the process in which the weathered materials carried out by erosion
settle down in a particular location.
Activity 7
Define the type of mass movement.
1. Fall
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
2. Slide
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
3. Flow
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
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4. Spread
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
5. Topple
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
Activity 8
Crossword puzzle: Identify the terms being described across and down that refer
to the agents of exogenic processes.
1
7
8
2
3
4
5
9
6
10
ACROSS
1. It refers to the aggregation or accumulation of weathered sediments to create
different landforms.
2. It is associated with many agents because it pulls the materials downslope.
70
3. It is a major erosional agent on areas on Earth’s surface that experience both
limited precipitation and high temperature.
4. It is one of the components of lithosphere.
5. It has the power to move large particles of weathered material than wind does.
6. It has the capacity to carry huge rocks and piles of debris over great distances.
DOWNWARD
7. It is the process that transports Earth’s materials from one place to another.
8. It is the process wherein materials are carried away.
9. It refers to the downslope movement of weathered materials along a welldefined surface.
10. It refers to the movement of saturated materials downslope like liquid.
What I Have Learned
Activity 9
Complete the concept map using the words below.
71
Water
Hydrolysis
Organic Activity
Deposition
Chemical
Wind
Burrowing
Physical
Glacier
Dissolution
Weathering
Human Activities
Abrasion
Erosion
Temperature
Frost wedging
Exogenic
Process
Pressure
Oxidation
Activity 10
Fill in the blanks with the correct answer.
1. The process of breaking down rocks either physically or chemically is called
__________________.
2.
___________________ is the breakdown of rocks into pieces without any change
in its composition.
3. ___________________is the response of oxygen with minerals.
4. ___________________ is a mixture of grains, organic matter, H2O, and gas.
5. ____________________is the breakdown of rocks that is caused by impact and
friction.
6. The change in the composition of rocks is called ______________________.
7. The separation and removal of weathered rocks due to different agents like
water, wind, and glacier is called ____________________.
8. The movement of sediments downslope under the influence of gravity is
____________________.
9. The process in which the weathered materials carried out by erosion and gravity
settle down in a particular location is called ________________.
10. ____________________ is a chemical reaction wherein rock forming minerals react
with water and form different kinds of clay minerals.
What I Can Do
Activity 11
Soil is an essential component of the earth’s crust. It enabled life to exist and
provides the services necessary for human survival. What is the effect of soil
erosion? What will you do to protect the community?
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
72
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
Assessment
Multiple Choice. Choose the letter of the best answer. Write the chosen letter on a
separate sheet of paper.
1. It is a
A.
B.
C.
D.
process that does NOT alter the composition of material.
abrasion
organic activity
chemical weathering
mechanical weathering
2. The rocks are fractured, cracked, and broken down into small pieces. What is
the type of weathering?
A. oxidation
B. pressure change
C. physical weathering
D. chemical weathering
3. Which of the following is an example of oxidation?
A. rusting
B. halite dissolves in water
C. feldspar decomposes to form clay
D. stalactites and stalagmites formation
4. Which activity does NOT facilitate erosion?
A. Kaingin
B. planting
C. loss of plant cover
D. steepening of slope
5. Which of the following diagram is TRUE about exogenic processes?
A. weathering – erosion – transport-deposition
B. sediments – erosion – weathering – transport
C. sediments – transport – erosion – weathering
D. erosion – sediments – weathering – transport- deposition
6. The removal and transport of weathered material from one place to another is
called __________.
A. erosion
B. deposition
C. weathering
D. sublimation
73
7. Which of the following is not an agent of erosion?
A. wind
B. water
C. rocks
D. glacier
8. Which of the following is NOT a role of gravity in erosion?
A. It moves glaciers down slope.
B. It loosens the land materials.
C. In mountains, it moves down large slabs of rocks.
D. It acts as agents of mass wasting like landslides, fall, mudflows, and
avalanches.
9. What is the term that refers to the process wherein rocks break down into
pieces?
A. erosion
B. deposition
C. weathering
D. mass wasting
10. Water reacts with one mineral to form a new mineral. Feldspar when weathered
forms clay. What process of chemical weathering is involved?
A. oxidation
B. hydrolysis
C. dissolution
D. all of the above
11. The repeated thawing and freezing of water in the cracks of rocks is known as
A. solution
B. abrasion
C. oxidation
D. frost wedging
12. Which of the following does NOT cause chemical changes in the composition of
rocks?
A. abrasion
B. oxidation
C. dissolution
D. hydrolysis
13. When
A.
B.
C.
D.
rusting of iron takes place, weathering is manifested by_______________.
abrasion
oxidation
hydrolysis
dissolution
74
14. The following are exogenic processes occurring on the earth surface EXCEPT:
A. erosion
B. eruption
C. deposition
D. weathering
15. Which of the following is the process by which sediments settle down in a
particular area?
A. transport
B. deposition
C. weathering
D. deformation
Additional Activities
Draw and explain how the products of weathering are carried away by erosion and
deposited elsewhere.
Explanation:
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
75
76
What I Know
What I Have Learned
What's More
Activity 10
1. Weathering
2. Mechanical weathering
3. Oxidation
4. Soil
5. Abrasion
6. Chemical weathering
7. Erosion
8. Mass wasting
9. Deposition
10. hydrolysis
Activity 5
Answer
may
vary
students’ perceptions.
among
Activity 6
Answer
may
students.
vary
among
Activity 7
Answer
may
students.
vary
among
What I Can Do
What's More
Activity 8
students’ perceptions.
D
C
A
B
A
A
C
B
C
B
D
A
B
B
B
What's in
Activity 1
ROCKS
IGNEOUS
SEDIMENTS
DISINTEGRATION
DECOMPOSITION
Assessment
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
D
C
B
B
D
A
D
D
D
C
A
D
C
A
D
Answer may
vary among
students’
perceptions.
What's New
What I Have Learned
Activity 9
Activity 2
Answer
may
vary
students’ perceptions.
among
Activity 3
Answer
may
vary
students’ perceptions.
among
What is It
Activity 4
I-Physical weathering
1. organic activity
2. human activity
3. burrowing of animals
II- Chemical weathering
4. dissolution
5. hydrolysis
Answer Key
Activity 11
Answer may vary among
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
References
Books
Albarico, Joni. 2016. Earth and Life Science. Lipa City, Batangas: Scolaire
Publishing
Bayo-ang et al. 2016. Earth and Life Science for Senior High School. Quezon City:
Educational Resources Corporation
Olivar II, J S., Rodolfo, R. and Hillel Cabria. 2016. Exploring Life through Science
Earth Science. Quezon City: Phoenix Publishing House, Inc.
Salandanan, G.G., Faltado, R.E., and Lopez, M.B. 2016. Earth and Life Sciences for
Senior High School. Quezon City: Lorimar Publishing, Inc.
Sia, SR D. and Leah Amor S. Cortez. 2016. SCIENCE in Today’s World for Senior
High School Earth and Life Science. Quezon City: Sibs Publishing House, Inc.
Thompson, G.R. and Jonathan Turk. 2012. Introduction to Earth Science. Pasay
City: Cengage learning Asia Pte Ltd.
77
Earth and Life Science
The Earth’s Internal Heat
Earth and Life Science – Senior High School
The Earth’s Internal Heat
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Christian Jay D. Salazar
Editors:
Erwin R. Abrencillo, Jocelyn M. Manset
Reviewers:
Dominic P. Almirez, Franz Kevin Manalo, Princess Paolah L. De Guzman, Marissa C. Betchaida, Job S. Zape Jr.
Louie L. Alvarez , Gregorio M. De Chavez, Jr., Jocelyn M. Manset, Mario B. Maramot, Elaine T. Balaogan,
Illustrator:
Ednelinda Robles, Cherry Amor Laroza, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan, Merthel M. Evardome
Nadine C. Celindro, , Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan, Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
78
Week
3
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the nature of Earth and Life Science. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module covers:
Lesson 1 – The Earth’s Internal Heat
After going through this module, you are expected to:
1. Describe where the Earth’s internal heat comes from.
2. Identify the sources of Earth’s internal heat; namely, radiogenic heat and
primordial heat.
3. Describe the parts and function of Earth’s interior.
4. Describe the processes of heat transfer in Earth’s mantle.
What I Know
Directions. Read each question and choose the correct answer. Write your answer
on a separate sheet of paper.
1. Why does radioactive decay play a very important role in earth’s internal
heat?
a. Radioactive element can be found anywhere in the planet.
b. When radioactive element decays, it produces heat.
c. Spontaneous nuclear disintegration of radioactive elements
produced thermal energy.
d. All of the above
2. How does the conduction in the surface of the earth affect the temperature
of our atmosphere?
a. Air molecules come in contact with the warmer surface of the land
and ocean resulting to the increase of its thermal energy.
b. Air molecules come in contact with the cooler surface of the land and
ocean resulting to the decrease of its thermal energy.
c. Air molecules does not come in contact with the warmer surface of
the land and ocean resulting to the increase of its thermal energy.
d. Air molecules do not come in contact with the cooler surface of the
land and ocean resulting to the increase of its thermal energy.
79
3. How does convection in Earth’s mantle affects the formation of landmass
like volcano and mountain?
a. Heat tries to escape in the interior of the earth.
b. Collision and separation of tectonic plates happens due to the slow
motion of convection cells.
c. When warm material in the mantle rises up to the surface (ground),
it will cool and sinks, these cooled materials will eventually be turned
into landmass.
d. All of the above
4. What is produced by the radioactive decay of isotopes in the mantle and
crust?
a. radiogenic heat
b. primordial heat
c. superheating
d. heat from the sun
5. This refers to the heat left over from the formation of the Earth?
a. radiogenic heat
b. primordial heat
c. superheating
d. heat from the sun
6. How much is the approximate terawatts in the flow of heat in Earth’s
interior to its surface?
a. 41 terawatts
b. 43 terawatts
c. 47 terawatts
d. 49 terawatts
7. Which of the following is the outermost layer of the Earth?
a. crust
b. core
c. discontinuity
d. mantle
8. Which of the following stores magma and located in a region just beneath
the crust all the way to the core?
a. crust
b. outer core
c. inner core
d. mantle
9. What heat transfer of fluid in the Earth’s interior results to the movement
of rocky mantle up to the surface?
a. convection current
b. conduction
c. insolation
d. radiation
80
10. Which of the following are boundaries between the three major layers
of the Earth?
a. arches
b. discontinuities
c. poles
d. plates
11. What refers to the shaking of the surface of the Earth resulting from a
sudden release of energy caused by a convection current?
a. earthquake
b. volcanic eruption
c. storm surge
d. hurricane
12. How does the mantle behave as a viscous fluid on a geological time
scale?
a. presence of high radiation
b. absence of high pressure
c. existence of high temperature
d. decrease in altitude
13.
What kind of heat transfer occurs mostly on the Earth’s surface?
a. conduction
b. convection
c. insolation
d. radiation
14. What kind of process by which heat energy is transmitted through
collisions between neighboring atoms or molecules?
a. conduction
b. convection
c. insolation
d. radiation
15.
What are the two factors that affect conduction on the Earth’s surface?
a. Radioactive decay and nuclear disintegration of elements.
b. Heat from the Earth's core and radiation from the Sun.
c. Movement of plates and radiation from the Earth’s core.
d. Stored magma and volcanic eruption.
81
Lesson 1
The Earth’s Internal Heat
Heat energy plays a vital role in our planet. It is one of the extreme factors in what
makes the world livable. If you think of a volcano, you know Earth must be hot inside.
The heat inside of our planet moves continents, build mountains and causes
earthquakes, but where does all this heat inside the earth come from?
Sources of heat in our planet can be identified as Primordial and Radiogenic heat.
During the early formation of the Earth, the internal heat energy that gradually
gathered together by means of dispersion in the planet during its few million years
of evolution is called Primordial heat. The major contribution of this internal heat
is the accretional energy – the energy deposited during the early formation of a planet.
The core is a storage of primordial heat that originates from times of accretion when
kinetic energy of colliding particles was transformed into thermal energy. This heat
is constantly lost to the outer silicate layers of the mantle and crust of the earth
through convection and conduction. In addition, the heat of the core takes tens of
thousands of years to reach the surface of the earth. Today, the surface of the earth
is made of a cold rigid rock since 4.5 billion years ago, the earth’s surface cools from
the outside but the core is still made of extremely hot material.
On the other hand, the thermal energy released as a result of spontaneous
nuclear disintegration is called Radiogenic Heat. It involves the disintegration of
natural radioactive elements inside the earth – like Uranium, Thorium and
Potassium. Uranium is a special kind of element because when it decays, heat
(radiogenic) is produced. Estimated at 47 terawatts (TW), the flow
of heat from Earth's interior to the surface and it comes from two main sources in
equal amounts: the radiogenic heat produced by the radioactive decay of isotopes in
the mantle and crust, and the primordial heat left over from the formation of
the Earth. Radioactive elements exist everywhere on the earth in a fairly significant
concentration. Without the process of radioactive decay, there would be fewer
volcanoes and earthquakes – and less formation of earth’s vast mountain ranges.
What’s In
Activity 1: Earth’s Layers
Directions. Label the diagram below with the names of each layers. Include a brief
description of each of the Earth’s layers.
82
Activity 2: Which of which?
Directions. Identify the sources of internal heat by writing RH for radiogenic heat
and PH for primordial heat. Write your answer on a separate sheet of paper.
____1. Presence of different isotopes of heat producing element in the mantle and
crust.
____2. Internal heat accumulated by dissipation of planet.
____3. Release of accretional energy.
____4. Processes involved in mantle convection.
____5. Release of thermal energy as a result of spontaneous nuclear disintegration.
What’s New
Activity 3: Find Me
Directions. Encircle the 10 words listed below. Words may appear straight across,
back-word straight across, up, and down.
MANTLE
CURRENT
EARTH
TECTONIC
RADIATION
CONVECTION
PRIMODIAL
RADIOGENIC
HEAT
CONDUCTION
S
M
V
X
R
S
B
J
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C
H
K
N
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Q
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83
Sources of Heat and Heat Transfer
Both sources of heat whether primordial or radiogenic undergo heat transfer and it
plays an important role to the continuous changes and development of our planet.
In connection, another part of this module describes the heat transfer in the Earth.
Three processes can transfer heat: conduction, convection, and radiation.
Conduction governs the thermal conditions in almost entire solid portions of the
Earth and plays a very important role in the lithosphere. Its processes happen in the
earth’s surface. Conduction is one of the three main ways that heat energy moves from
place to place. Technically, it can be defined as the process by which heat energy is
transmitted through collisions between neighboring atoms or molecules. Heat from
the Earth's core and radiation from the Sun is transferred to the surface of
the Earth by conduction. Contact of the atmosphere with these warm surfaces
transfers thermal energy, which then heats up the rest of the air through convection.
Convection involves transfer of heat by the movement of mass, which is a more
efficient means of heat transport in the Earth compared to pure conduction.
Convection dominates the thermal conditions in the zones where large quantities of
fluids (molten rocks) exist, and thus governs the heat transport in the fluid outer
core and the mantle. In geological time scale, the mantle behaves as a viscous fluid
due to the existence of high temperatures. In convection current, the mantle of the
earth moves slowly because of transfer of heat from the interior of the earth up to
the surface. This result to the movement of tectonic plates. Hot materials are added
at the edges of a plate and then it cools. At those edges, it becomes dense by its
exposure from the heat and sinks into the earth at an ocean trench. This start the
formation of volcanoes.
Radiation is the least important mode of heat transport in the Earth. The process of
heat exchange between the Sun and the Earth, through radiation, controls the
temperatures at the Earth's surface. Inside the Earth, radiation is significant only in
the hottest parts of the core and the lower mantle. When the land and water become
warm in summer, they emit long – wavelength infrared radiation that is readily
absorbed by the atmosphere. This continues during night time too. Convection in the
air then spreads out the thermal energy throughout the atmosphere.
84
Activity 4: My Notepad
Directions. In your own words, how do the three (3) major processes of heat transfer
affect the temperature of the Earth? Write your answer on the space provided.
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
What is It
Activity 5: Fill me up!
Directions. Use the word bank to fill in the gaps in the passage below. Write your
answers on a separate sheet of paper.
Convection
Convection current
Crust
Earth’s plates
Earthquakes
Plate tectonics
Plates
Volcanoes
The surface layer of the earth is called the ___________________. This layer is
broken up into pieces called ___________________. These __________________ “float” on
the mantle. Heat rising and falling inside the mantle creates current called
_____________________. The ___________________ current move the __________________.
This movement is known as ___________________. The movement of the earth’s plate
causes earthquakes and ___________________.
85
What’s More
What’s inside the Earth’s Mantle?
Figure A. Convection
Figure B. Conduction
Figure A shows a convection cell, warm material rises (up to the surface of the earth)
and cool material sinks. These cooled materials will eventually turn to land
formation. In mantle convection, the heat source is the core. The core of the earth is
very hot. It is nearly as hot as the surface of the sun – about 6000˚C. Convection
current is relevant to the movement of tectonic plate because the heat builds up
pressure underneath the crust (tectonic plates). As they become unstable, they push
against each other (subduction) and rise upwards or one goes under the other.
Figure B shows the process of conduction on how air molecules come in contact with
the warmer surface of the land or ocean, resulting to the increase of its thermal
energy through conduction. The thermal energy of the core is transferred to the
surface of the earth and the lower levels of ocean by conduction.
86
Activity 6: Picture Analysis
Directions. Read and analyze figures A and B. Answer the questions stated below.
a. Figure A shows the process of convection in the earth’s mantle. How does
it affect the formation of mountains and the temperature in the surface
(ground)?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
b. How the convection current affects the movement of tectonic plates?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
c. How convection in earth’s interior and conduction in the surface affect the
temperature in our atmosphere?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
d. How subduction cause the formation of land mass like mountains and
volcano?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
e. Why does earthquake occur in subduction zone? (The area where
subduction occur)
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
Synthesis: Based from figure A and B, how convection and conduction is interrelated?
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
87
Activity 7: Crossword Puzzle
Directions. Complete the crossword by filling in the word that describes each clue.
6
7
9
1
2
5
4
3
Across:
2. air molecules come in contact with warmer molecules
3. crust are made up of puzzle – like landmass called _____.
4. rising and falling movement of material in the mantle
5. when tectonic plates push with each other
7. it is the result of movement of earth’s plate
Down:
1. elements that play a vital role in Earth’s internal heat
6. least important mode of heat transport
8. warm material rise; cool material ______.
9. heats build up underneath the crust
88
8
What I Have Learned
Directions. Read each question and fill in the blanks with the correct term to
complete the statement. Write your answer on a separate sheet of paper.
1. __________________ in the interior of the earth can be classified as primordial
and radiogenic heat.
2. The thermal energy released as a result of spontaneous ____________ is called
Radiogenic Heat while the internal heat energy accumulated by ____________
in a planet during its few million years of evolution is called Primordial heat.
3. There are three processes can transfer heat: ____________, ____________, and
radiation.
4. ____________ governs the thermal conditions in almost entire solid portions of
the Earth and plays a very important role in the lithosphere.
5. ____________ involves transfer of heat by the movement of mass, which is a
more efficient means of heat transport in the Earth compared to pure
conduction.
6. _________________ is the least important mode of heat transport in the Earth.
7. Convection current is relevant to the movement of ______________________
because the heat builds up pressure underneath the crust.
8. The ___________________ of the core is transferred to the surface of the earth
and the lower levels of ocean by conduction.
9. Air molecules come in contact with the warmer surface of the land or ocean,
resulting to the increase of its ________________.
10. The area where subduction occur is called _________________.
What I Can Do
Activity 6: Illustrate and Explain
Directions. Illustrate the example indicated in the given scenario in the box where
conduction and convection are applied. Then, relate it to the processes occurring in
the Earth’s internal heat.
89
CONDUCTION
Chocolate candy in your hand will eventually melt as the heat from your body is
released and makes it melted.
Explanation:
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
CONVECTION
A heater in the hot air balloon heats the air. The air inside is trapped causing the
balloon to rise.
Explanation:
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
Assessment
Directions. Read each question and choose the correct answer. Write your answers
on separate sheet of paper
1. What process by which heat is directly transmitted through a substance when
there is a difference of temperature or between adjoining regions, without
movement of the material?
A. conduction
B. convection
C. insolation
D. radiation
90
2. Why radioactive decay plays a significant role in Earth’s internal heat?
A. Radioactive element can be found anywhere in the planet.
B. When radioactive element decays, it produces heat.
C. Spontaneous nuclear disintegration of radioactive elements produced
thermal energy.
D. All of the above
3. Which of the following is described as the process of heat exchange between
the Sun and the Earth that controls the temperatures of the latter?
A. conduction
B. convection
C. insolation
D. radiation
4. What is produced by the radioactive decay of isotopes in the mantle and crust?
A. radiogenic heat
B. primordial heat
C. superheating
D. heat from the sun
5. How the conduction in the surface of the earth affect the temperature of our
atmosphere?
A. Air molecules come in contact with the warmer surface of the land and
ocean resulting to the increase of its thermal energy.
B. Air molecules come in contact with the cooler surface of the land and
ocean resulting to the decrease of its thermal energy.
C. Air molecules do not come in contact with the warmer surface of the
land and ocean resulting to the increase of its thermal energy.
D. Air molecules do not come in contact with the cooler surface of the land
and ocean resulting to the increase of its thermal energy.
6. What are the two factors that affects conduction on the Earth’s surface?
A. radioactive decay and nuclear disintegration of elements
B. heat from the Earth's core and radiation from the Sun
C. movement of plates and radiation from the Earth’s core
D. stored magma and volcanic eruption
7. What kind of process by which heat energy is transmitted through collisions
between neighboring atoms or molecules?
A. conduction
B. convection
C. insolation
D. radiation
91
8. What kind of heat transfer occurs mostly on the Earth’s surface?
A. conduction
B. convection
C. insolation
D. radiation
9. How does the mantle behave as a viscous fluid on a geological time scale?
A. radiation
B. pressure
C. temperature
D. altitude
10. What refers to the shaking of the surface of the Earth resulting from a
sudden release of energy caused by a convection current?
A. earthquake
B. volcanic eruption
C. storm surge
D. hurricane
11. Which of the following are boundaries between the three major layers of the
earth?
A. arches
B. discontinuity
C. poles
D. plates
12. What heat transfer of fluid in the earth’s interior results to the movement of
rocky mantle up to the surface of the earth?
A. convection current
B. conduction
C. insolation
D. radiation
13. Which of the following stores magma and located in a region just beneath the
crust all the way to the core?
A. crust
B. outer core
C. inner core
D. mantle
14. Which of the following is the outermost layer of the Earth?
A. crust
B. core
C. discontinuity
D. mantle
92
15. How much is the approximate terawatts in the flow of heat in Earth’s interior
to its surface?
A. 41 terawatts
B. 43 terawatts
C. 47 terawatts
D. 49 terawatts
Additional Activities
Directions. Using your smartphones, take a picture of five (5) common
activities/scenarios on which heat transfer is applied. It may be material, event or
situation. Classify each whether it is conduction, convection or radiation. Provide
brief explanation to support your answer. Post the picture and your answer on a
separate sheet of paper.
PICTURE
KIND OF HEAT
TRANSFER
93
BRIEF EXPLANATION
94
What's New
Activity 3
Activity 5
Answer may vary according
to student’s perception
Answer may vary according
to student’s perception
What's It
Assessment
1.
2. D
3. D
4. A
5. A
6. B
7. A
8. D
9. C
10.
11.
12.
13.
14.
15.
D
A
B
A
D
A
C
Activity
1.
2.
3.
4.
5.
6.
7.
8.
4
Crust
Earth’s Plates
Plates
Convection current
Convection
Plate tectonics
Earthquakes
Volcanoes
What I Know
1. D
2. A
3. D
4. A
5. B
6. C
7. A
8. D
9. A
10. B
11. A
12. C
13. A
14. A
15. B
What's in
Activity 1
a. Crust – Oceanic and
Continental crust
b. Mantle – Upper and
Lower mantle
c. Core – Outer and Inner
core
Activity 2
RH
PH
PH
RH
RH
1.
2.
3.
4.
5.
Answer Key
What's More
References
Gerald Schubert; Donald Lawson Turcotte; Peter Olson (2001). "Chapter 2: Plate
tectonics". Mantle convection in the earth and planets. Cambridge University
Press. pp. 16 ff. ISBN 978-0-521-79836-5.
Green, Ronald. 2007. “Numerical Simulation of Thermal – Hydrological Processes
Observed at the Drift-Scale Heater Test at Yucca Mountain, Nevada.” Elsevier
Geo – Engineering Book Series, vol. 2 (2004) 175 – 180.
https://sciencedirect.com/science/article/pii/S1571996004800375
Kobes, Randy. "Mantle Convection". Archived from the original on 9 June 2011.
Retrieved 26 February 2020. Physics Department, University of Winnipeg
McDonough, W.F. (2003), "Compositional Model for the Earth's Core", Treatise on
Geochemistry, Elsevier, pp. 547
568, Bibcode:2003TrGeo...2..547M, doi:10.1016/b0-08-043751-6/020156, ISBN 9780080437514
Pease, V., Percival, J., Smithies, H., Stevens, G., & Van Kranendonk, M. (2008).
“When did plate tectonics begin? Evidence from the orogenic record. When did
plate tectonics begin on planet Earth, 199–208.
Stern, R. J. (2008). Modern-style plate tectonics began in Neoproterozoic time: An
alternative interpretation of Earth’s tectonic history. When did plate tectonics
begin on planet Earth, 265–280.
Ricard, Y. (2009). "2. Physics of Mantle Convection". In David Bercovici and Gerald
Schubert (ed.). Treatise on Geophysics: Mantle Dynamics. 7. Elsevier
Science. ISBN 9780444535801
95
Earth and Life Science
Magmatism
Earth and Life Science
Magmatism
First Edition, 2020
Republic Act 8293, Section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Jessa M. Ariola
Editors:
Melanie I. Samudio, Jocelyn M. Manset
Reviewer:
Jason Ricaforte, Angelica Beriña, Princess Paolah L. De Guzman, Marissa C. Betchaida, Louie L. Alvarez
Gregorio M. De Chavez, Jr, Jocelyn M. Manset, Mario B. Maramot, Elaine T. Balaogan, Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Job S. Zape Jr. Elaine T. Balaogan, Elaine T. Balaogan
Merthel M. Evardome, Nadine C. Celindro, Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan,
Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
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96
Week
3
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the nature of Earth and Life Science. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module covers:
Lesson 1 – Magmatism
After going through this module, you are expected to:
1. describe the characteristics of magma;
2. identify the substances/elements present in magma; and
3. explain the processes involved in the formation of magma.
What I Know
Directions. Choose the letter of the best answer. Write the chosen letter on a
separate sheet of paper.
1. What term should be used to describe a semi-liquid hot molten rock
located beneath the Earth?
A.
B.
C.
D.
lava
sand
rocks
magma
2. What do you call the semi-liquid hot molten rocks found on the surface of earth
once the volcano erupts?
A.
B.
C.
D.
magma
rocks
sand
lava
3. What process occurs if there are formation and movement of magma under
the earth’s crust?
A.
B.
C.
D.
decompression melting
partial melting
heat transfer
flux melting
4. In what part of the earth does magmatism happen?
A. Asthenosphere
B. Earth’s crust
97
C. Earth’s core
D. Lithosphere
5. What are the two most abundant elements in magma?
A.
B.
C.
D.
oxygen and magnesium
silicon and aluminum
silicon and oxygen
oxygen and iron
6. What will happen to the temperature of rocks during partial melting?
A.
B.
C.
D.
decreases
increases
remains the same
all of the above
7. Which of the following is NOT a factor of partial melting?
A.
B.
C.
D.
addition of volatiles
decrease in pressure
an increase in pressure
an increase in temperature
8. During partial melting, which of the following minerals melt last?
A.
B.
C.
D.
biotite
quartz
feldspar
none of the above
9. During partial melting, which of the following minerals melt first?
A.
B.
C.
D.
biotite
quartz
feldspar
both b and c
10. Conduction in mantle happens when heat is transferred from hotter molten
rocks to the Earth’s cold crust. What process is being described?
A.
B.
C.
D.
flux melting
heat transfer
partial melting
decompression melting
11. Mantle rocks remain solid when exposed to high pressure. However, during
convection, these rocks tend to go upward (shallower level) and the pressure is
reduced. What process is being described?
A. flux melting
B. heat transfer
C. partial melting
D. decompression melting
98
12. When water or carbon dioxide is added to hot rocks, the melting points of
minerals within the rocks decrease. What process is being described?
A.
B.
C.
D.
flux melting
heat transfer
partial melting
decompression melting
13. During partial melting of magma, where does heat transfer take place?
A. convergent boundary
B. mid-ocean ridge
C. subduction zone
D. all of the above
14. During partial melting of magma, where does decompression melting take
place?
A.
B.
C.
D.
convergent boundary
mid-ocean ridge
subduction zone
all of the above
15. During partial melting of magma, where does flux melting take place?
A.
B.
C.
D.
convergent boundary
mid-ocean ridge
subduction zone
all of the above
Lesson 1
Magmatism
Do you still remember what happened to Taal Volcano last January 12, 2020? Yes,
you are right. This volcano, which is located at the province of Batangas, spewed ash
plumes up to nine miles (14 kilometers) into the air due to a “steam-driven” or
phreatic eruption. According to the Philippine Institute of Volcanology and
Seismology (PHIVOLCS), for the past two days, over 600 volcanic tremors have been
recorded which was an indication of continuous movement of magma or molten rocks
beneath the volcano. You might be wondering how magma got inside the volcano.
For this module, we will be discussing all about magma; its formation and
composition.
99
What’s In
Activity 1. Decoding Time
In the previous lesson, you have learned that Earth’s interior is the site of
great amount of heat. Let us review first about this before proceeding to the next
topic.
Your task is to reveal the magic words by decoding the given numbers to their
corresponding letters of the alphabet. Then, complete the statement below using
those words.
18
1
4
9
1
10
9
15
14
1. Word: ______________________________________
18
1
4
9
15
7
5
14
9
3
8
5
1
20
5
1
20
2. Word: ______________________________________
3
15
14
4
21
3
20
9
15
14
3. Word: ______________________________________
16
18
9
13
15
18
4
9
1
12
8
4. Word: ______________________________________
3
15
14
22
5
3
20
9
15
14
5. Word: ______________________________________
9
14
20
5
18
14
1
12
8
5
1
20
6. Word: ______________________________________
The Earth’s internal heat comes from two main sources: the radiogenic heat
produced by the radioactive decay of isotopes in the mantle and crust, and the (7)
_______________left over from the formation of the Earth. The heat can be transferred
by three processes, namely, (8) ____________, (9) _______________, and (10)
_______________.
100
What’s New
Activity 2. Picture Analysis
Mount Mayon is one of the most active volcanoes in the Philippines. It erupted for
eight minutes last January 23, 2018, spewing a 3-mile-tall column of debris and
volcanic gas. It exploded at least five more times for two days.
According to Philippine Institute of Volcanology and Seismology (PHIVOLCS), two
"explosion-type earthquakes" had occurred, as well as 18 tremor events — some of
which sent forth fountains of lava. One of the lava flows advanced nearly 2 miles
from the summit's crater.
Observe the picture of Mount Mayon and answer the following.
A. Give three (3) descriptions about the picture.
1. ________________________________________________________________________
2. ________________________________________________________________________
3. ________________________________________________________________________
B. What is the material being extruded by Mount Mayon? Where do you think
did this material come from?
___________________________________________________________________________
___________________________________________________________________________
101
What is It
What is Magma?
Magma is composed of semi-liquid hot molten rocks located beneath the Earth,
specifically in the melted mantle rock and oceanic plate. This molten state, when
solidified, creates igneous rocks found on the surface of the Earth.
Do you know the difference between magma and lava? Magma and lava are both
molten rocks. However, they differ in location. Magma is found in the magma
chamber of the volcano while lava is found on the surface of earth once the volcano
erupts.
Magmatism is a process under the earth’s crust where formation and movement of
magma occur. So where does these formation and movement take place? These
happen in the lower part of the Earth’s crust and in the upper portion of the mantle,
known as asthenosphere.
Figure 1. Convection Process in Asthenosphere
On the given figure, identify the substances/elements present in magma.
Guide Questions:
1. Which of the following elements
has the highest amount in the
magma? _________________________
2. Which of the following elements
has the lowest amount in the
magma? _________________________
Figure 2. Composition of Magma
3.
What
are
the
top
two
compositions
of
magma?
_________________________________
102
How is magma formed?
The magma present in the lower crust and upper mantle of the Earth is formed or
generated through the process of partial melting. In this process, different minerals
in rock melt at different temperature and pressure. Another factor being considered
in this process is the addition of volatile materials such as water and carbon dioxide.
This is a diagram showing how minerals in rocks undergo partial melting.
This solid rock
contains the
minerals quartz,
feldspar, biotite, and
hornblende.
The first minerals
that melt are quartz
and some types of
feldspar. The
background
represents magma.
Minerals such as
biotite and
hornblende
generally melt last,
which changes the
composition of
magma.
Figure 3. The Process of Partial Melting
Melting in the mantle requires one of three possible events to occur:
1. AN INCREASE IN TEMPERATURE: Conduction in mantle happens when heat is
transferred from hotter molten rocks to the Earth’s cold crust. This process is known
as heat transfer. As magma rises, it is often hot enough to melt the rock it touches.
It happens at convergent boundaries, where tectonic plates are crashing together.
Rocks are composed of minerals. These rocks start to melt once the temperature in
the lower crust and upper mantle increases or exceeds the melting point of minerals.
The temperature of mantle is around 1200 degrees Celsius. Rock minerals such as
quartz and feldspar begin to partially melt at around 650-850 degrees Celsius.
Figure 4. Heat Transfer in Convergent Boundary
2. A DECREASE OF PRESSURE: Mantle rocks remain solid when exposed to high
pressure. However, during convection, these rocks tend to go upward (shallower
level) and the pressure is reduced. This triggers the melting of magma. This is known
103
as decompression melting. This process occurs at the Mid-Ocean Ridge, an
underwater mountain system.
Figure 5. Depression Melting in Mid-Ocean Ridge
3. ADDITION OF VOLATILES: When water or carbon dioxide is added to hot rocks,
flux melting occurs. The melting points of minerals within the rocks decrease. If a
rock is already close to its melting point, the effect of adding these volatiles can be
enough to trigger partial melting. It occurs around subduction zones.
Figure 6. Flux Melting in Subduction Zone
104
What’s More
Activity 3. Concept Map
Directions. Complete the concept map about Magmatism. Choose your answers on
the box below.
asthenosphere
convergent boundary
decompression
melting
flux melting
heat transfer
igneous rocks
lava
magma
mid-ocean ridge
oxygen
partial melting
105
pressure
silicon
subduction zone
temperature
volatiles
volcano
Activity 4. What Do You Think?
Directions. Based on the discussion, justify your answer to the following questions.
a. Do you think partial melting will occur if the pressure is high in the
asthenosphere?
__________________________________________________________________________
__________________________________________________________________________
b. Do you think partial melting will occur if there is too much amount of water
in the subduction zone?
__________________________________________________________________________
_________________________________________________________________________
c. Do you think partial melting will occur if there is direct contact of hot molten
rock in the Earth’s crust?
___________________________________________________________________________
___________________________________________________________________________
What I Have Learned
Activity 5. Complete Me!
Directions. Read the following statements and fill in the blanks.
1. __________ is composed of __________ hot molten rocks located beneath the
Earth, specifically in the melted mantle rock and oceanic plate.
2. When magma solidifies, it creates __________ found on surface of the Earth.
3. Magma is found in the __________ of the volcano while __________ is found on
the surface of earth once the __________ erupts.
4. __________ is a process under the earth’s crust where formation and movement
of magma occur.
5. Magma is mostly composed of elements __________ and __________.
6. Magma present in the lower crust and upper mantle of the Earth is formed or
generated through the process of __________.
7. Melting in the mantle requires one of three possible events to occur:
__________, __________, and __________.
8. Conduction in mantle happens when heat is transferred from hotter molten
rocks to the Earth’s cold crust. This process is known as __________. It
happens at __________, where tectonic plates are crashing together.
9. During convection, rocks tend to go upward (shallower level) and the pressure
is reduced. This is known as __________. This process occurs at the __________,
an underwater mountain system.
10. When water or carbon dioxide is added to hot rocks, __________ occurs. It
occurs around __________.
106
What I Can Do
Activity 6. Apply It!
Directions. Observe the illustrations below and relate these to the lesson.
What is in the picture?
_____________________________________________
_____________________________________________
How will you relate it to magmatism?
_____________________________________________
_____________________________________________
A.
What is in the picture?
_____________________________________________
_____________________________________________
How will you relate it to magmatism?
B.
_____________________________________________
_____________________________________________
What is in the picture?
______________________________________________
______________________________________________
How will you relate it to magmatism?
______________________________________________
______________________________________________
C.
107
Activity 7. ACRONYM!
Directions. Use the word MAGMATISM as an acronym. Use each letter to represent
word/s that is related to the lesson.
Assessment
Directions. Choose the letter of the best answer. Write the chosen letter on a
separate sheet of paper.
1. What process occurs if there are formation and movement of magma
under the earth’s crust?
A. flux melting
B. heat transfer
C. partial melting
D. decompression melting
2. What term should be used to describe a semi-liquid hot molten rocks
located beneath the Earth?
A. lava
B. sand
C. rocks
D. magma
3. In what part of the earth does magmatism happen?
A. Asthenosphere
B. Earth’s crust
C. Earth’s core
D. Lithosphere
4. What do you call the semi-liquid hot molten rocks found on the surface of
earth once the volcano erupts?
A. lava
B. sand
C. rocks
D. magma
108
5. During partial melting of magma, where does decompression melting take
place?
A. convergent boundary
B. mid-ocean ridge
C. subduction zone
D. all of the above
6. Which of the following is NOT a factor of partial melting?
A. addition of volatiles
B. decrease in pressure
C. an increase in pressure
D. an increase in temperature
7. When water or carbon dioxide is added to hot rocks, the melting points of
minerals within the rocks decrease. What process is being described?
A. flux melting
B. heat transfer
C. partial melting
D. decompression melting
8. During partial melting, which of the following minerals melt last?
A. biotite
B. quartz
C. feldspar
D. none of the above
9. What are the two most abundant elements in magma?
A. oxygen and magnesium
B. silicon and aluminum
C. silicon and oxygen
D. oxygen and iron
10. What will happen to the temperature of rocks during partial melting?
A. decreases
B. increases
C. remains the same
D. all of the above
11. During partial melting of magma, where does heat transfer take place?
A. convergent boundary
B. mid-ocean ridge
C. subduction zone
D. all of the above
12. Mantle rocks remain solid when exposed to high pressure. However, during
convection, these rocks tend to go upward (shallower level) and the
pressure is reduced. What process is being described?
A. flux melting
B. heat transfer
C. partial melting
D. decompression melting
109
13. During partial melting, which of the following minerals melt first?
A. biotite
B. quartz
C. feldspar
D. both b and c
14. During partial melting of magma, where does flux melting take place?
A. convergent boundary
B. mid-ocean ridge
C. subduction zone
D. all of the above
15. Conduction in mantle happens when heat is transferred from hotter
molten rocks to the Earth’s cold crust. What process is being described?
A. flux melting
B. heat transfer
C. partial melting
D. decompression melting
Additional Activities
Directions. Read the poem below and answer the question that follows.
Magma
by Jemie Ann A. Quiroba
(Mataasnakahoy Senior High School)
HUMSS 12 SY 2019-20
I kept myself
I hid to deep
Burned myself, with my own heat
I must go out, must go with the flow
My red tears shouted pain, as it glows
So as I am, later on it would be tough
I freed my burning self and I'll go reach the top
What is the message of the poem?
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
110
111
1.
2.
3.
magma, semi-liquid
igneous rocks
magma chamber, lava,
volcano
4. magmatism
5. silicon, oxygen
6. partial melting
7. an increase in
temperature, decrease
of pressure, volatiles
8. heat transfer,
convergent boundaries
9. decompression melting,
mid-ocean ridge
10. flux melting,
subduction zones
What I Can Do
Activity 6
a.
b.
c.
The ice cream is melting
due to sunlight. This is
related to heat transfer.
Compressing clothes in the
luggage. This is related to
the
decompression
melting.
Melting
of
different
materials. This is the same
as the minerals in the
rocks melt to form magma.
Activity 7
Answers may vary.
What's More
Activity 3
1. magma
2. igneous rocks
3. silicon
4. oxygen
5. lava
6. volcano
7. asthenosphere
8. partial melting
9. temperature
10. heat transfer
11. convergent boundary
12. pressure
13. decompression melting
14. mid-ocean ridge
15. volatiles
16. flux melting
17. subduction zone
What's More
Activity 4
a. No. There is NO partial
melting
because
there
should be a decrease of
pressure
in
the
asthenosphere.
b. No. There is NO partial
melting because too much
water will decrease the
melting of the rocks.
c. Yes. There is partial melting
because heat is transferred
from the molten rocks to the
Earth's cold crust.
What I Know
1. D
2. D
3. B
4. A
5. C
6. B
7. C
8. A
9. D
10. B
11. D
12. A
13. A
14. B
15. C
What's in
Activity 1
1. RADIATION
2. RADIOGENIC HEAT
3. CONDUCTION
4. PRIMORDIAL HEAT
5. CONVECTION
6. INTERNAL HEAT
7. primordial heat
8. conduction
9. convection
10. radiation
Assessment
1. C
2. D
3. A
4. A
5. B
6. C
7. A
8. A
9. C
10. B
11. A
12. D
13. D
14. C
15. B
Answer Key
What I Have Learned
References
Alfie
B., “How does magma form?”, MyTutor, Accessed May 28, 2020.
https://www.mytutor.co.uk/answers/11278/A-Level/Geology/How-doesmagma-form/
Charles, Alan. Slideshare., “Section 2: Igneous Rock Preview Key Ideas: The
Formation
of
Magma.”
Accessed
May
28,
2020.
https://slideplayer.com/slide/7543230/
Chesnutt, Betsy. “What is Magmatism? - Definition, Process & Types”, Study.com,
Accessed May 28, 2020. https://study.com/academy/lesson/what-ismagmatism-definition-process-types.html
CNN Philippines Staff. “Taal still a threat with 'magma resupply' – Phivolcs”, CNN
Philippines.
Published
Jan
20,
2020.
https://www.cnnphilippines.com/news/2020/1/20/Taal-Volcanomagma.html
Evers, Jeannie. “Magma's Role in the Rock Cycle”. National Geography. Published
Oct. 31, 2014. https://www.nationalgeographic.org/article/magma-role-rockcycle/
Gordon, Micah. “Three Ways to Melt a Rock”, Sciencing. Updated April 24, 2017.
https://sciencing.com/three-ways-melt-rock-8505802.html
Panchuk, Karla.“Magma and How It Forms”, University of Saskatchewan.
Accessed
May
28,
2020.
https://openpress.usask.ca/physicalgeology/chapter/7-1-magma-and-howit-forms/
USGG Science for a Changing World. “Magma Mash.” Accessed May 28, 2020.
https://pubs.usgs.gov/gip/19/downloads/Chapter_1/Activities/Magma_mas
h.pdf
Wamsley, Laurel. “Philippine Volcano Erupts, Causing 56,000 To Flee”, The Two Way
News. Published January 28, 2018. https://www.npr.org/sections/thetwoway/2018/01/23/579966911/philippine-volcano-erupts-causing-56-000-tofl
112
Earth and Life Science
Changes in Mineral Components
and Texture of Rocks
(Metamorphism)
Earth and Life Science – Senior High School
Changes in Mineral Components and Texture of Rocks (Metamorphism)
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Chris B. De Jesus
Editors:
Erwin R. Abrencillo, Jocelyn M. Manset
Reviewers:
Dominic P. Almirez, Franz Kevin Manalo, Princess Paolah L. De Guzman, Marissa C. Betchaida, Louie L. Alvarez
Gregorio M. De Chavez, Jr., Jocelyn M. Manset, Mario B. Maramot, Elaine T. Balaogan, Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Cherry Amor Laroza, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan, Merthel M. Evardome, Nadine C. Celindro
Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan, Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
113
Week
4
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the Nature of Earth and Life Science. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module included lesson about the Changes in Mineral Components and Texture
of Rocks (Metamorphism).
After going through this module, you are expected to:
1.
Describe the changes in mineral components and texture of rocks due to changes
in pressure and temperature (metamorphism).
2. Identify rock samples based on the effects of changes on temperature and
pressure.
3. Analyze through a diagram on how temperature and pressure affect the mineral
components and texture of rocks.
What I Know
Directions: Read and analyze each statement and choose the letter of the correct
answer. Write your answer in a separate paper.
1. Which of the following statements describe metamorphosis?
A. process of rock formation
B. change in rock formation
C. process which involves changes
D. change that takes place within body of rock once expose to different
conditions
2. Which of the following metamorphism is affected by heat and reactive fluid?
A. contact only
B. regional only
C. both contact and regional
D. neither contact nor regional
3. Which of the following is an example of rock produced by a contact
metamorphism?
A. slate
B. gneiss
C. marble
D. hornfels
114
4. Which of the following led to the formation of deformed rocks with foliation?
E. volume of air entering the rocks
F. temperature and rising of magma
G. temperature and volume of minerals
H. pressure and recrystallization of minerals
5. What is the effect of heat and pressure in rocks as there is an increase in
depth?
E. foliation surfaces shine
F. low-grade metamorphism
G. grain size becomes coarse
H. increase in mineral alignment
6. Which of the following is the main factor in the process of regional
metamorphism?
A. air
B. water
C. pressure
D. temperature
7. Which of the following rock samples is less influenced by the heat?
A. slate
B. schist
C. gneiss
D. phyllite
8. How do you describe the grain size texture of hornfels?
A. fine
B. coarse
C. coarse to fine
D. medium coarse
9. All of the following samples are included in non-foliated classification of
metamorphic rock EXCEPT
A. marble
B. phyllite
C. hornfels
D. metaconglomerate
10. What happened to the temperature and pressure if the rocks are buried down
deep?
A. increases
B. decreases
C. remain constant
D. intermittently degrading
115
11.Which of the following is NOT true about metamorphism?
A.
B.
C.
D.
Slate and Gneiss are examples of foliated rock.
Contact Metamorphism creates non-foliated rocks.
Pressure is the main factor of contact metamorphism.
Magma will bake the surrounding rocks due to different in temperature.
12. Complete the analogy: Foliated is to slate as non-foliated is to
A.
B.
C.
D.
schist
gneiss
marble
phyllite
13. Compete the analogy: contact: heat as regional: ________
A. air
B. fire
C. pressure
D. temperature
14. Which type of metamorphism is caused by high temperature and high pressure
enacted over a large volume of crust?
A. burial
B. contact
C. regional
D. pyroclastic
:
15. Which of the following is a distinct projecting textural feature of regional
metamorphic rocks?
A. ripples
B. bedding
C. foliation
D. non-foliation
This part of the module contains topics about metamorphism. Students must
describe changes in mineral component and texture of rocks due to changes in
pressure and temperature by doing the different activities included in this part of the
module. Likewise, concept about the metamorphism is available for the students
reference in doing each activity incorporated in the procedure.
What’s In
Metamorphism is the change that takes place within a body of rock as a
result of it being subjected to conditions that are different from those in which it is
formed. It is from the Greek word “meta” means change and “morphe” means form.
116
Major Task: Take note of the number of correct responses you will be
making in every activity (What I know, What’s new, What is it, What’s more
A and B, What I have learned, and What I can do). Then, look for the
corresponding letter of each number of responses and think of the words
which are associated in metamorphism. Accomplish it in the “Additional
Activity” part.
Example:
A. What I know: 6-F=Fluid
B. What’s new : 4-D= Deep Rock
C. What is it: 7- G=Gneis
D. What’s more A&B: 9-I= Intrusive
E. What I have learned: 8-H=Heat
F. What I can do: 5=E= Energy.
What’s New
Directions. The box in the left side contains important words which may or may not
be associated to metamorphic process. Identify words which are related to the said
process by choosing it from that box and write it on the opposite box.
HEAT
VOLCANIC ROCK
PRESSURE
FLUID
MANTLE
TEMPERATURE
WEATHERING
Score:
_______
CEMENTATION
117
What is It
Activity: Heat, Pressure and Metamorphism
METAMORPHIC ROCK is formed at the surface of the
Earth through the process of metamorphism with
recrystallization of minerals in rocks due to changes in
pressure and temperature conditions.
A. Contact Metamorphism
B. Regional Metamorphism
MAIN FACTORS
Heat and Reactive Fluids
Pressure
The table below shows the scheme of metamorphic rock identification. It
includes key points on how to classify rocks depending on its type, texture and grain
size. Specific rock samples are also presented with their map symbol. Likewise,
compositions of metamorphic rock are also situated parallel to the type of
metamorphism.
118
Let’s do it!
Directions. Answer the question below by putting a check in the box which will
response to the question.
Question: How do temperature and pressure affect the metamorphic rock formation?
(5 points)
If the rocks are buried deep, temperature and pressure will get increased.
Contact metamorphism creates no-foliated metamorphic rocks.
Magma will bake the surrounding rocks due to difference in temperature.
Deformed rocks with foliation/lineation is brought by pressure and
recrystallization of minerals.
Pressure is the main factor of contact metamorphism
Score:
Slate and gneiss are examples of foliated rocks.
_______
What’s More
Activity A: Metamorphism Map
Directions. Complete the concept map about metamorphism by supplying the
missing words and phrases which can be chosen from the box below.
(Tell something about
metamorphism)
“Meta” means ___
“Morphe” means_____
Two Classifications
of Metamorphic
rocks are…
Where are metamorphic
rocks formed?
Non-foliates
It projects ________
It projects ________
Score:
_______
Ex.
Key Terms
form volcano
lineation/foliation
schist
gneiss
non-Foliated
fine grain
hornfels
119
magma
pressure
marble
heat
slate
quartzite
Activity B: Word Cryptogram
Directions. Arrange the scrambled letters by putting the correct sequence on the
shaded boxes to form a word (rock sample) based on the given description. Use the
numbered boxes to discover the hidden word.
1. It has low-grade metamorphism of shale.
T
E
L
A
S
2
2. Plays mica crystals visible from metamorphism of clay or feldspar.
T
S
S
I
C
H
4
3. Metamorphism of bituminous coal.
A
N
I
T
H
R
A
C
T
E
3
4. High –grade metamorphism.
S
S
I
N
E
G
5. Foliation surface is shiny from microscopic mica crystals.
E
T
P
Y
H
L
L
I
1
The hidden word is _______________.
120
Activity C: Rock You
Directions. Read and analyze the diagram below. It will provide you better
understanding about the lesson.
Sedimentary
Rock
Metamorphic
Rock
Igneous Rock
The third family of rock is the metamorphic rock formed from
either igneous rock or sedimentary rocks that have been changed
due to tremendous heat and pressure.
Metamorphism does not actually melt the rocks but transforms
them into denser, more compact rocks. Mineral may also be
rearranged due to chemical reactions involving fluids that enter
rocks
Metamorphic Rocks are used for variety of purposes.
Slate is used commercially for your classroom blackboards and
for pool table tops.
Marble is used in the construction of building floors and bathroom
walls and counter parts (Pavico and Faraon, 2007, 224-225).
Extreme heat and pressure change the original state of an existing
rock. They also change chemical composition and physical
structure of existing rocks. Combinations of minerals in rocks are
stable only over specific ranges of pressure and temperature. At
pressure and temperature not within the ranges, the minerals
form a different combinations call mineral assemblages (Kasten
2012, 290-291).
121
Activity D: My Metamorphic Puzzle
Directions. Identify the words being described on the right part and write it on the
specific area.
2
3
Across
1. Different combination of a mineral
formation
5
3. Used commercially classroom
blackboards
4
1
5. Used construction of building
floors
Down
2. It transforms rock into denser and
more compact rock
4. Occurs from the increasing in both
heat and pressure
122
What I Have Learned
Directions. Match the statements in column A with the indicated terms in column
B. Write the letter of the correct answer on the blank before each number.
A.
B.
_____1. It is a Greek word which means “change”.
a. quartzite
_____2. It is one of the factors affecting
b. metamorphism
metamorphic rock which creates
c. meta
lineation.
d. regional metamorphism
_____3. Hornfels, marble and _____.
e. heat
_____4. It is the main factor of contact
f. pressure
metamorphism.
g. phyllite
_____5. It is a process of changing
h. metaconglomerate
rock formation.
_____6. It has a foliation surface shiny
i. anthracite
from
microscopic mica crystal.
j. metamorphic rock
k. contact metamorphism
______7. A rock sample which maybe distorted
or stretched
______8. A rock sample with carbon composition.
______9. It is formed by great heat and pressure
deep within the earth.
______10.It takes place when magma introduces
great amount of heat into an existing rock
resulting in the recrystallization and mineral
reaction in the rock.
Score:
_______
123
BONUS TASK: For your own reflection and understanding, answer the posted
question below. You may use the available diagram in answering the question.
Based from the quotation above, how do you see the similarities and differences of
human and rocks?
Human
Rock
What I Can Do
A. Directions. Give the uses of the following metamorphic rock samples.
Write your answer in the box provided under each rock samples.
SLATE
MARBLE
124
SCHIST
B. Directions. Read the following tips on how you can make rock useful at home.
Look for rocks with different textures as the highlight of your task. Choose
one from the three suggestions and once you do it, take a picture of it and
attach it in the space below. In case, you do not have ways to print it, just
illustrate your project on the space provided.
1. Rock can be displayed in crystal or transparent vase/jar.
2. Make a good arrangement of rocks in a jar. You can make it with same
color, same textures or sizes.
3. Aside from the rock in jar. You can also use them in a garden by putting it
together with plants. Arrange it according to your taste.
Assessment
Directions. Read and analyze each statement and choose the letter which
corresponds to the correct answer by shading the circle before the number.
1. Which of the following words is NOT associated with metamorphism?
A. heat
B. mantle
C. pressure
D. weathering
2. What is the effect of heat and pressure in rocks as there is an increase
in depth?
A.
B.
C.
D.
foliation surfaces shine
low-grade metamorphism
grain size becomes coarse
increase in mineral alignment
125
3. What is the main factor that affects regional metamorphism?
A. heat
B. fluid
C. water
D. pressure
4. Which of the following rock sample contains fine texture?
A. gneiss
B. hornfels
C. quartzite
D. meataconglomerate
5. What rock is the result of the metamorphism of limestone?
A. slate
B. schist
C. marble
D. phyllite
6. What are the main factors for contact metamorphism to occur?
A. air and water
B. heat and reactive fluid
C. temperature and water
D. pressure and temperature
7. How do you described the grain size texture of Hornfels?
A. fine
B. coarse
C. coarse to fine
D. medium coarse
8. Which of the following rock samples is less influenced by the heat?
A. phyllite
B. gneiss
C. schist
D. slate
9. Which of the following is NOT true about metamorphism?
A. Slate and gneiss are examples of foliated rock.
B. Contact metamorphism creates non-foliated rocks.
C. Pressure is the main factor of contact metamorphism.
D. Magma will bake the surrounding rocks due to different in
temperature.
126
10. What happens to the grain size of the minerals in rocks when the heat is
increased? Its size
A. increases
B. decreases
C. remains constant
D. degrades intermittently
11. Which of the following DOESN’T belong to the group?
A. mica
B. quartz
C. dolomite
D. feldspar
12. Foliation or lineation happens among deformed rocks due to
A. eruption of magma from the mantle to the crust
B. pressure and recrystallization of rocks
C. increase in temperature in the surrounding area
D. increase in volume of water as the rocks’ depth increases
13. Which of the following relationships is INCORRECT?
A. fine grain: slate
B. banding: gneiss
C. non-foliated: phyllite
D. contact heat: hornfels
14. How do temperature and pressure affect metamorphism?
A. Pressure and temperature increase as you go up to the crust.
B. The deeper the rock depth, the higher the pressure and temperature.
C. Foliation happens as there is an increase in the pressure and
temperature.
D. Magma cannot bake the surrounding rocks due to the difference in
temperature.
15. Samer is walking down the river when she see an unknown metamorphic rock.
Which of the following characteristic can BEST help her to immediately identify
the type of metamorphism that the rock underwent using a magnifying glass?
A. foliation
B. grain size
C. name of the rock
D. kind of mineral present in the rock
Score:
________
______
127
Additional Activities
A. Directions. Indicate the scores you obtained from the previous activities.
Please refer to the major task in case you forget the directions. Write your
answer on the space provided in the box below.
ACTIVITY
SCORE
What I Know
What’s New
What is it
What’s More (A+B)
What I have Learned
What I can Do
Assessment
128
FORMED WORDS
B. Directions. For additional information, take time to read and observe the
concept map.
Pressure
Existing Rock
Pressure
underground
can occur to
Water
influenced by
melting
of rock, occurs in
of rock, forms
moves upwards
because of low
magma
rises to Earth’s
surface, where
it is called
density
rises but cool below
surface, becoming
lava
cools to
make
intrusive
rocks
extrusive
rocks
erupts
from a
volcano
The concept map above presents the processes between igneous and
metamorphic rocks. It shows how metamorphism takes place from any existing
rocks such as igneous rock.
129
130
What’s More
What I can Do
Assessment
A.
Slate:
1. good roofing material
2. decorative gardening
stones
3. base for snooker tables
4. and it was used as a
writing board (or writing
slate)
Marble:
1. use for building or
sculpture material
2. can be ground down and
use as cleaning and soap
material
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Slate
Schist
Anthracite
Gneiss
Phyllite
D.
1. Assemblages
2. Slate
3. Marble
4. Metamorphosis
5. Regional
What I Know
1. D
2. A
3. D
4. D
5. C
6. C
7. A
8. A
9. B
10. A
11. C
12. C
13. C
14. C
15. C
What’s New
Heat
Pressure
Fluid
Mantle
Temperature
Volcanic Rock
Schist:
1.
use for building,
sculpture. Paving and
grade decoration
What is It
If
the rocks buried deep,
temperature and pressure
in get increase.
Contact metamorphism
creates no-foliated
metamorphic rocks.
Magma will bake the
surrounding rocks due to
difference in temperature.
Deformed rocks with
foliation/lineation is
brought by pressure and
recrystallization of
minerals.
Slate and gneiss are
examples of foliated rocks
What I Have Learned?
1. C
6. G
2. F
7. H
3. A
8. I
4. E
9. J
5. B
10. K
Bonus Task
Example
1. Human shows
characteristics and
attitudes which are
unique to humans as a
rational being.
2. Rocks display
characteristic, beauty,
appearance which are
different from other
types of rocks
3. However, in spite of
differences both are the
same when it comes to
the ability of showing
how unique and
wonderful they are.
Answer Key
B.
1.
2.
3.
4.
5.
D
C
D
B
C
B
A
D
C
A
C
B
C
B
B
References
A. Books
Acosta Herma D. et al. Science Learners Material Grade 10, 2015.
Commission on Higher Education. Earth and Life Science for Senior High School.
C.P. Garcia Ave., Diliman, Quezon City Philippines. Commission on Higher
Education, 2016
Kasten Lileth P. Integrated Science: Secondary Education Curriculum, 2012.
Pavico-Ferriols Josefina and Faraon-Darvin Genevieve, Exploring Life Through
Science:Integrated Science, 2007.
Vengco Lilia G. and Religioso Teresita F. You and the Natural World: Integrated
Science, 3rd Edition 2008.
B. Electronic References
Steven Earle, Gabriola Island, 2015 retrieved from
https://opentextbc.ca/geology/chapter/chapter-7-metamorphism-and
metamorphic-rocks/
131
Earth and Life Science
Igneous Rocks: How Are They
Formed?
Earth and Life Science – Senior High School
Igneous Rocks: How Are They Formed?
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the
Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for
exploitation of such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this
module are owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use
these materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over
them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Jessa M. Ariola
Editors:
Erwin R. Abrencillo, Jocelyn M. Manset
Reviewers:
Dominic P. Almirez, Franz Kevin Manalo, Princess Paolah L. De Guzman, Marissa C. Betchaida,
Louie L. Alvarez, Gregorio M. De Chavez, Jr., Jocelyn M. Manset, Mario B. Maramot, Elaine T. Balaogan,
Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Cherry Amor Laroza, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan, Merthel M. Evardome, Nadine C. Celindro
Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan, Rosalinda A. Mendoza
,
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
132
Week
4
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the nature of Earth and Life Science. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module covers:
Lesson 1 – Igneous Rocks: How Are They Formed?
After going through this module, you are expected to:
1.
2.
3.
4.
compare and contrast the formation of different types of igneous rocks;
distinguish intrusive from extrusive igneous rocks;
differentiate igneous rocks based on silica content; and
differentiate the different textures of igneous rocks.
What I Know
Directions. Read the following questions and choose the letter of the best answer.
Write the chosen letter on a separate sheet of paper.
1. What classification of rocks is formed from solidification and crystallization of
molten rocks?
A.
B.
C.
D.
igneous rocks
metamorphic rocks
sedimentary rocks
all of the above
2. What Latin word was the term “igneous” derived from?
A.
B.
C.
D.
ignus
lithos
meta
sedere
3. Which of the following is/are the process/es to igneous rocks?
A.
B.
C.
D.
sedimentation
recrystallization
solidification and crystallization
solidification and recrystallization
133
4. Which type of igneous rocks based on composition has the highest amount of
silica content?
A.
B.
C.
D.
felsic
intermediate
mafic
ultramafic
5. What happens to the molten rocks when they reach the Earth’s surface?
A.
B.
C.
D.
They flow continuously.
They cool down and solidify.
Their temperature remains the same.
They remain semi-liquid molten rocks.
6. Which of the following is NOT an extrusive igneous rock?
A.
B.
C.
D.
basalt
granite
obsidian
rhyolite
7. Which type of igneous rock forms from lava on Earth's surface?
A.
B.
C.
D.
clastic
extrusive
intrusive
non-clastic
8. Which type of igneous rock forms when magma hardens beneath Earth's
surface?
A.
B.
C.
D.
clastic
extrusive
intrusive
non-clastic
9. What is the size of the crystals if the rock cools slowly and forms below the
Earth’s surface?
A.
B.
C.
D.
large
no crystal
small
none of the above
10. Which of the following is NOT an intrusive igneous rock?
A.
B.
C.
D.
diorite
gabbro
granite
obsidian
134
11. Which of the following is NOT true about extrusive rocks?
A.
B.
C.
D.
They cool down quickly.
They have small crystals.
These are formed beneath the Earth.
Basalt and scoria are example of these rocks.
12. Which of the following is TRUE about intrusive rocks?
A.
B.
C.
D.
They
They
They
They
have fine grains.
are usually dark.
are formed from lava.
have usually low density.
13. What type of igneous rock texture has large minerals?
A.
B.
C.
D.
aphanitic
glassy
phaneritic
vesicular
14. How are igneous rocks classified based on their origin?
A.
B.
C.
D.
large or small crystals
plutonic and volcanic
coarse or fine grains
from magma or lava
15. How does the amount silica affect the color of igneous rock?
A.
B.
C.
D.
It has no effect at all.
It doesn’t matter what the color is.
The lesser the silica has, the lighter the color is.
The more the silica it has, the lighter the color is.
Lesson 1
Igneous Rocks: How Are
They Formed?
Have you tried mountain climbing? Did you notice different rocks in the mountain
trail? Do they look the same? Do they have different colors? Do they have crystals?
Do they undergo same process of formation? Some of you might think that all rocks
are just the same, however if we study it thoroughly, you will be surprised that they
are different in terms of their formation, physical and chemical characteristics.
In your previous lesson, you already learned that rocks can be classified as igneous,
sedimentary, and metamorphic. For this module, we will be focusing on igneous
rocks and how they are formed.
135
What’s In
Activity 1. Crossword Puzzle
In the previous lesson, you have learned about metamorphism of rocks. Let us review
first about this before proceeding to the next topic.
Directions. Fill-in the crossword puzzle with the words being described. Match the
number of the sentences to the boxes of placed across or down the grid.
ACROSS
1. It is the change that
takes place within a body
of rock as a result of being
subjected to conditions.
3. It is a type of
metamorphic rock which
is formed due to pressure.
DOWN
2. It is the main factor of
regional metamorphism.
4. It is a type of
metamorphic rock which
is formed due to heat.
5. It is the main factor of
contact metamorphism.
What’s New
Activity 2. Comic Strip Analysis
Directions. This comic presented below is about a short conversation of a
grandmother and her granddaughter. Read the comics and answer the given
questions.
Grandma,Grandma,
is that Taal
is that
Taal Volcano?
Volcano?
Yes,
Yes,
mymy dear. That is Taal
dear.Volcano. It has rocks
formed from solidified lava.
136
Wow! I want to learn
more
Wow! I want to
about rocks Grandma.
learn more
This
This isis
a a granite. It is an
granite.igneous rock.
Guide Questions:
1.
2.
3.
4.
5.
Who are the characters in the comic?
Where do you think is the location of the characters?
What is the topic of their conversation?
According to the grandmother, Taal volcano is composed of what kind of rock?
What specific rock is mentioned in the conversation?
What is It
What are Igneous rocks?
Igneous rocks are one of the three major categories of rocks. The word igneous is
derived from the Latin word for fire, ignis or ignus.
These rocks are commonly found in the surface and beneath the Earth, specifically
in divergent boundaries, convergent boundaries, subduction zones and hotspots. Not
all igneous rocks have the same physical and chemical characteristics. They differ in
the origin, process of formation, color, density, size of grains, crystals and many
more.
How are igneous rocks formed?
Igneous rocks are formed through the process of solidification and crystallization
of molten rocks; magma and lava. When hot, molten rocks reach the surface of the
earth, they undergo changes in temperature and pressure causing them to cool,
solidify and crystallize. Moreover, there are also solidification and crystallization
magma beneath the earth.
What are the types of igneous rocks based on their formation?
In terms of formation, igneous rocks can be classified into two: intrusive and
extrusive rocks. Below is the comparison of these two types.
Table 1. Differences Between Intrusive and Extrusive Rocks
Point of Comparison
Other terminology
Location
Process of Formation
Origin
Intrusive Rocks
plutonic rocks
beneath the Earth
plutonic
formed from magma
137
Extrusive Rocks
volcanic rocks
surface of the Earth
volcanic
formed from lava
Color
Density
usually dark
usually dense
mafic: magnesium and
iron
Composition
Rate of Cooling
cools slowly
Size of Grains
large/coarse grains
Size of Crystals
large crystals
usually light colored
usually low density (light)
felsic: feldspar
(aluminum)
cools quickly
(with voids/holes)
fine/small or no grains
(fine/glassy)
small or no crystals
These are some examples of intrusive and extrusive rocks.
Gabbro
Diorite
Figure 1. Examples of Intrusive Rocks
Basalt
Granite
Obsidian
Rhyolite
Scoria
Figure 2. Examples of Extrusive Rocks
What are the types of igneous rocks based on composition?
Igneous rocks can also be classified according to their composition. They are
composed of SiO2 or silica. Not all igneous rocks have the same silica content. If
there is oversaturation of silica in the magma, its minerals will precipitate. On the
other hand, if there is undersaturation of silica in the magma, its minerals will not
138
precipitate and will not be present in the igneous rocks. The viscosity of magma is
also affected because of silica content.
There are four classifications of igneous rocks based on silica content: ultramafic,
mafic, intermediate and felsic.
1. Ultramafic Igneous Rocks
They have a very low silica content; less than 45% of SiO2.
Before forming into igneous rocks, its magma has very low viscosity.
Its color is ranged too black (peridotite) to olive green (dunite).
Their density is very high.
They are rich in pyroxene and olivine minerals.
Examples of these rocks are peridotite and dunite.
2. Mafic Igneous Rocks
They have a low silica content; 45-52% of SiO2.
Before forming into igneous rocks, its magma has low viscosity; more
viscous than ultramafic magma.
They have black color.
Their density is high.
They are composed of pyroxene, calcium-rich plagioclase feldspar
Examples of these rocks are gabbro and basalt.
3. Intermediate Igneous Rocks
They have a high silica content; 53-65% of SiO2.
Before forming into igneous rocks, its magma has intermediate
viscosity; more viscous than the mafic magma.
Their color is gray.
Their density is intermediate.
They are composed of biotite, alkali feldspar and quartz.
Examples of these rocks are diorite and andesite.
4. Felsic Igneous Rocks
They have a very high silica content; more than 65% of SiO2
Before forming into igneous rocks, its magma has high viscosity; more
viscous than the intermediate magma.
They have light color.
Their density is very low.
They are composed of quartz and alkali feldspar.
Examples of these rocks are granite and rhyolite.
Granite
Diorite
Gabbro
Peridotite
INTERMEDIATE
MAFIC
ULTRAMAFIC
Dark
Rock types
Composition
FELSIC
Light
Color
139
SiO2
MgO
Major
mineral
content
70%
0.95%
Quartz
Alkali Feldspar
60%
2.5%
Biotite
Alkali Feldspar
Quartz
50%
15%
Pyroxene
Plagioclase
Feldspar
40%
48%
Pyroxene
Olivine
Figure 3. Differences of Igneous Rocks based on Composition
Based on the illustration, you will notice the differences of these four classifications
of igneous rocks in terms of their color. Ultramafic has the darkest color and felsic
has the lightest color. To sum, the higher the silica content is, the lighter its color
while the lower the silica content is, the darker its color. Thus, amount of silica
affects the color of the rocks.
Percentage of mineral by volume
Composition
Rock types
FELSIC
Granite
Rhyolite
70%
INTERMEDIATE
Diorite
Andesite
MAFIC
Gabbro
Basalt
Silica content
ULTRAMAFIC
Peridotite
40%
Sodium and potassium content
Iron, magnesium, and calcium content
700°C Temperature at which melting starts
1200°C
Figure 4. Differences of Igneous Rocks based on Composition
in Relation to Silica Content and Temperature
This is another illustration showing the differences of ultramafic, mafic, intermediate
and felsic igneous rocks; rock types, kind and percentage of minerals; percentage of
silica content; and ranges of temperature.
Felsic has the highest silica content while ultramafic has the lowest silica content.
On the other hand, felsic is exposed to 700 degree Celsius and ultramafic is exposed
to 1200 degree Celsius. It means when igneous rock is exposed to extreme high
temperature, its color is darker, while if it is exposed to lower temperature, its color
is light.
140
What are the types of igneous rocks based on texture?
Igneous rocks have different textures. Texture of a rock is the size and arrangement
of the minerals it contains.
Phaneritic texture – Rocks have large minerals (example: granite)
Aphanitic texture- The mineral grains are too small to see with the unaided
eye (example: basalt)
Vesicular texture – Rocks have many pits from gas escape (example: basalt)
Porphyritic texture – Rocks have two (2) distinct grain sizes, large and small
(example: andesite porphyry)
Glassy texture- Rocks do have obvious minerals (example: obsidian)
What’s More
Activity 3. Types of Igneous Rocks, Described!
Directions. Given are the different examples of igneous rocks. Supply the missing
information to complete the table below.
Rock
Type of
Formed
Cooling
Crystal
Igneous Rock
from
rate
size (small,
(intrusive or
(magma
(fast or
large or no
extrusive)
or lava)
slow)
crystal)
Rhyolite
extrusive
1.
2.
small
Gabbro
3.
4.
slow
large
Granite
intrusive
5.
slow
6.
Scoria
7.
lava
8.
No crystals
141
Obsidian
9.
lava
fast
10.
Activity 4. Concept Map
Directions. Complete the blank concept map by supplying the needed information
using the given terms and phrases related to igneous rocks.
Intrusive
composed of magnesium
and iron
lava cools quickly
large crystal form
composed of aluminum
Extrusive
magma cools slowly
small or no crystal form
form from cooling and
solidification of lava and
magma
Igneous Rock
1.
2.
3.
4.
5.
6.
7.
8.
9.
142
Activity 5. Venn Diagram
Directions. Compare and contrast the four classifications of igneous rocks based
on composition.
Ultramafic
Felsic
Mafic
Intermediate
Activity 6. Crossword
Directions. Fill-in the crossword puzzle with the words being described. Match the
number of the sentences to the boxes of placed across or down the grid.
ACROSS
1. Rocks have two distinct
grain sizes.
2. The mineral grains are
too small to see with the
unaided eye.
3. Rocks have many pits
from gas escape.
DOWN
1. Rocks have large
minerals.
4. Rocks do have obvious
minerals
143
What I Have Learned
Activity 7. Complete Me!
Directions. Read the following statements and fill-in the blanks with the correct term
or phrase.
1. The word igneous is derived from the Latin word for _________, ignis or ignus.
2. Igneous rocks are commonly found in the _________and _________ the Earth,
specifically in divergent boundaries, convergent boundaries, subduction zones
and hotspots.
3. Igneous rocks are formed through the process of _________ and _________ of
molten rocks; magma and lava.
4. When hot, molten rocks reach the surface of the earth, they undergo changes
in _________and _________ causing them to _________, _________and _________.
5. In terms of formation, igneous rocks can be classified into two; _________ and
_________ rocks.
6. Intrusive rocks are formed solidified _________ while extrusive rocks are
formed from solidified _________.
7. Intrusive rocks cool _________ while extrusive rocks cool _________.
8. Intrusive rocks have _________ grains and crystals while extrusive rocks have
_________ grains and crystals.
9. Examples of intrusive rocks are _________, _________, and _________.
10. Examples of extrusive rocks are _________, _________, _________, and _________.
11. Igneous rocks can also be classified according to their composition. They are
composed of ________.
12. If there is ________ of silica in the magma, its minerals will precipitate.
13. If there is ________ of silica in the magma, its minerals will not precipitate and
will not be present in the igneous rocks.
14. There are four classifications of igneous rocks based on silica content;
________, ________, ________ and ________.
15. ________ has the highest amount of silica while ________ has the lowest.
16. ________ is the most viscous while ________ is the least.
17. ________ has the darkest color while ________ has the lightest
18. ________ is the densest while ________ is the lightest.
19. ________ is exposed to the highest temperature while ________ is exposed to
the lowest temperature.
20. The higher the silica content is, the ________ the color is and the ________ the
silica content is, the darker the color is.
144
What I Can Do
Activity 8. Apply It!
A. Directions. Go outside and collect 3 pieces of rock. Observe their color, shape,
texture and other physical characteristics. You may crack or scratch the rock to
observe them clearly. Then, record your data in the table below.
Rocks (Drawing)
Type of Igneous Rock and its
Characteristics
1.
2.
3.
B. Directions. Read the given statement and provide the answer.
You are in a community park. While walking, you have noticed that there are
many rocks on the ground. From these rocks, how will you know if they are igneous
rocks? What are the things you should consider in identifying igneous rocks?
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
145
Assessment
Directions. Read the following questions and choose the letter of the best answer.
Write the chosen letter on a separate sheet of paper.
1. What Latin word was the term “igneous” derived from?
A. ignus
B. lithos
C. meta
D. sedere
2. What classification of rocks is formed from solidification and crystallization of
molten rocks?
A. igneous rocks
B. metamorphic rocks
C. sedimentary rocks
D. all of the above
3. Which type of igneous rocks based on composition has the highest amount of
silica content?
A. felsic
B. intermediate
C. mafic
D. ultramafic
4. Which of the following is/are the process/es of igneous rocks?
A. sedimentation
B. recrystallization
C. solidification and crystallization
D. solidification and recrystallization
5. Which of the following is NOT an extrusive igneous rock?
A. basalt
B. granite
C. obsidian
D. rhyolite
6. What happens to the molten rocks when they reach the Earth’s surface?
A. They flow continuously.
B. They cool down and solidify.
C. Their temperature remains the same.
D. They remain semi-liquid molten rocks.
7. Which type of igneous rock forms when magma hardens beneath Earth's
surface?
A. clastic
B. extrusive
C. intrusive
D. non-clastic
8. Which type of igneous rock forms from lava on Earth's surface?
A. clastic
B. extrusive
146
C. intrusive
D. non-clastic
9. Which of the following is NOT an intrusive igneous rock?
A. diorite
B. gabbro
C. granite
D. obsidian
10. What is the size of the crystals if the rock cools slowly and forms below the
Earth’s surface?
A. large
B. no crystal
C. small
D. none of the above
11. Which of the following is TRUE about intrusive rocks?
A. They have fine grains.
B. They are usually dark.
C. They are formed from lava.
D. They have usually low density.
12. Which of the following is NOT true about extrusive rocks?
A. They cool down quickly.
B. They have small crystals.
C. These are formed beneath the Earth.
D. Basalt and scoria are example of these rocks.
13. How are igneous rocks classified based on their origin?
A. large or small crystals
B. plutonic and volcanic
C. coarse or fine grains
D. from magma or lava
14. How does the amount silica affect the color of igneous rock?
A. It has no effect at all.
B. It doesn’t matter what the color is.
C. The lesser the silica has, the lighter the color is.
D. The more the silica it has, the lighter the color is.
15. What type of igneous rock texture has large minerals?
A. aphanitic
B. glassy
C. phaneritic
D. vesicular
147
Additional Activities
A. Directions. Take some pictures of igneous rocks available in your barangay
and make a collage. Write a short paragraph or description about your
output.
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
B. Directions. Read the quotation and write your interpretation about it.
“Sometimes we must be like stone, strong enough to stand on our own.”
- WhenEarthSpeaks
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
148
149
Activity 6
Across
1. porphyritic
2. aphanitic
3. vesicular
Down
1. phaneritic
4. glassy
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
silica
oversaturation
undersaturation
ultramafic, mafic,
intermediate, felsic
felsic, ultramafic
felsic, ultramafic
ultramafic, felsic
ultramafic, felsic
ultramafic, felsic
lighter, lower
What's in
Activity 1
Across
1. metamorphism
3. regional
Down
2. pressure
4. contact
5. heat
What I Know
1. A
2. A
3. C
4. A
5. B
6. B
7. B
8. C
9. A
10. D
11. C
12. B
13. C
14. D
15. D
What's New
Activity 2
1.
2.
3.
4.
5.
grandmother and
her granddaughter
place where Taal
volcano can be seen
They are talking
about rocks found in
Taal volcano.
igneous rocks
granite
What's More
Activity 3
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
lava
fast
intrusive
magma
magma
large
extrusive
fast
extrusive
no crystals
Assessment
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
A
A
A
C
B
B
C
B
D
A
B
C
D
D
C
What I Can Do
Activity 8
A. Answers may vary.
B. Their color, density,
grains, crystals, and
location of the rocks
Activity 4
1.
2.
3.
4.
5.
6.
7.
8.
9.
form from cooling
and solidification of
lava and magma
intrusive
large crystal form
magma cools slowly
composed of
magnesium and iron
extrusive
small or no crystal
form
lava cools quickly
composed of
aluminum
Activity 7
1. fire
2. surface, beneath
3. solidification,
crystallization
4. temperature,
pressure, cool,
solidify, crystallize
5. intrusive, extrusive
6. magma, lava
7. slowly, quickly
8. large, small or no
9. gabbro, diorite,
granite
10. basalt, obsidian,
rhyolite, scoria
Answer Key
Activity 5
Answers may vary
References
“How to Classify Igneous Rocks Into (Ultramafic, Mafic, Intermediate and Felsic)?”, Geology
In, accessed May 31, 2020, http://www.geologyin.com/2014/12/how-to-classifyigneous-rocks-into.html
“Igneous
Rocks
Worksheet”,
Study
Resource,
accessed
https://studyres.com/doc/959258/igneous-rocks-worksheet
“Igneous
Rocks”,
Columbia
Education,
accessed
http://www.columbia.edu/~vjd1/igneous.htm
May
May
28,
31,
2020,
2020,
“Introduction
to
the
Rock
Cycle”,
OHMAA+,
accessed
May
25,
2020,
https://ops.instructure.com/courses/10087/pages/introduction-to-the-rock-cycle
“Intrusive
Igneous
Rocks”,
Minerals4Kids,
accessed
May
27,
http://www.mineralogy4kids.org/?q=rock-cycle/intrusive-igneous-rocks
“Lesson 3: “The Big Rock” Lesson: Introduction to Rocks
”,
Lehigh
University,
accessed
May
28,
http://www.ei.lehigh.edu/envirosci/geology/rocks/pdf/lesson3.pdf
2020,
2020,
“Question: Because Magmas And The Igneous Rocks That Form From”, Chegg Study,
accessed May 31, 2020, https://www.chegg.com/homework-help/questions-andanswers/magmas-igneous-rocks-form-large-range-chemical-compositionsgeologists-use-classifications-q17090207
C.E. Jones, “Igneous Rocks by Composition “, Department of Geology and Planetary Science,
accessed
May
31,
2020,
https://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousCompositions.h
tml
David Michaud, “Igneous Rocks Formations”, 911metallurgist, published October 15, 2015,
https://www.911metallurgist.com/blog/igneous-rocks
Fran
Anderson, “When Earth Speaks”, Pinterest, accessed
https://www.pinterest.com.au/pin/393713192409577434/
May
25,
2020,
Hobart M. King, Ph.D., RPG. “What are Igneous Rocks?”, Geoscience News and Information
Geology.com, accessed May 27, 2020, https://geology.com/rocks/igneousrocks.shtml
Matt Williams, “Igneous Rocks: How Are They Formed?”, Universe Today, published
December 16, 2015, https://www.universetoday.com/82009/how-are-igneousrocks-formed/
Stephen A. Nelson, “Classification of Igneous Rocks”, Tulane University General, updated
January 12, 2011, https://geology.com/dictionary/glossary-u.shtml
“An Introduction to Geology”, University of Hawai’i at Manoa, accessed May 31, 2020,
http://www.soest.hawaii.edu/coasts/lecture/gg101/powerpoints/Minerals_Igneous
.pdf
150
Earth and Life Science
Movement of Plates and
Fomation of Folds and Faults
Earth and Life Science
Movement of Plates and Formations of Folds and Faults
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writer:
Chris B. De Jesus
Editors:
Erwin R. Abrencillo , Jocelyn M. Manset
Reviewers:
Dominic P. Almirez, Franz Kevin Manalo, Gregorio M. De Chavez, Jr., Jocelyn M. Manset, Mario B. Maramot,
Princess Paolah L. De Guzman, Marissa C. Betchaida, Louie L. Alvarez, Elaine T. Balaogan, Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Cherry Amor Laroza, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan, Merthel M. Evardome, Nadine C. Celindro
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Office Address:
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E-mail Address:
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151
Week
5
What I Need to Know
This module was designed and written with you, the learner in mind. This aims to
help you master the Nature of Earth and Life Science. The scope of this module
permits can be used in different learning situations. The language used recognizes
the diverse vocabulary level of students. The lessons are arranged to follow the
standard sequence of the course. But the order in which you read them can be
changed to correspond with the textbook you are now using.
The module included lesson about the Movements of Plates and Formation of Folds
and Faults.
After going through this module, you are expected to:
1. Identify the three types of plate movements from a short excerpt.
2. Expound three types of plate movement based on plate tectonics theory
using an illustration.
Cite specific examples of land forms as outcomes of plate movement
What I Know
Directions. Read and analyze each statement and choose the letter which
corresponds to the correct answer by shading the circle before each number.
152
153
154
Lesson 1
Movement of Plates and Formation of
Folds and Faults
This module contains topics about plate movement leading to the formation of folds
and faults. Students must explain how the movement of plates leads to the formation
of folds and faults by doing different activities included in this module. Likewise,
concept about the Plate’s movement is available for the students reference in doing
each activity incorporated in the procedure.
What’s In
Directions. Cross out the words which are not associated with plate tectonics. Then,
put the remaining words and write your understanding below the box.
FAULT
WEATHERING
CONVERGENT
PLATES
SUBDUCTION
VOLCANIC ARC
RIDGE
FOLD
MOUNTAIN
MESOSAURUS
Words
DIVERGENT
Your Own Understanding
Score:
_______
155
What’s New
Directions. Read and analyze the excerpt. Identify the three indicated types plate
movements. Illustrate it on the box provided below (10 points).
TYPE OF PLATE BOUNDARIES
Studying plate boundaries is important because along these boundaries
deformation of the lithosphere is happening. Divergent plate movement occurs when
plates pull apart from each other. When two (2) plates diverge, pieces from such
plates sink towards the Earth’s mantle. On the other hand, convergent movement
occurs when plates crush into each other and land crumples, forming trenches and
mountains. Lateral or transform fault movement occurs when plates move alongside
each other in different directions.
Illustration 1.
Illustration 2.
Illustration 3.
_________
_________
_________
156
What is It
A. Directions. Complete the diagram below by filling in the blank boxes with the
corresponding terms/phrases.
PLATE TECTONICS
Three types of Plates’
Movement
CONVERGENT
‘
Plates move
alongside each other
in different
directions
Plates pull apart
from each other
Land formation or
geologic features:
____________________
Land formation or
geologic features:
____________________
Land formation or
geologic features:
____________________
Score:
_______
157
A. Directions. Read and analyze the diagram below which will provide you
background information about Plate Boundaries.
Transform
Plate
Boundary
It is also called as strike slip fault boundary, the plates slide past each other
horizontally. This is a type of boundary that cuts through California, the wellknown San Andreas Fault. The San Andreas fault zone, which is about 1300
km long and is tens of kilometer wide, slice through two thirds of the length
of California. Along with it, the Pacific Plate has been for 10 million years, at
an average rate of about 5cm/yr (Pavico and Faraon, 2007, 193).
Convergent
Plate
Boundary
The heavier oceanic crust sinks below the lighter continental crust. It
happens along convergent boundaries where plates are moving toward each
other and sometimes one plate sink under another (subduction). Marianas
Trench marks where the fast moving Pacific Plate converges against the
slower moving Philippine Plate. This boundary is often sits of major volcanoes
such as Mount Fuji in Japan. In a collision of two pieces of oceanic crust, the
result is a chain of volcanic islands, of which Indonesia is a prime example.
Where oceanic crust collides with a plate carrying continent, the result is a
chain of volcanoes on the continent such as the Cascade of volcanic chain in
Pacific Northwest of the US and the Andes Mountains of South America.
When two continental crusts collide, the result is a range of mountains such
as Himalayan Mountain yr (Pavico and Faraon, 2007, 193-194).
158
Divergent Plate Boundaries are boundaries where the earth’s tectonic plates
are moving apart. For most part, these boundaries are located on the ocean
floors, where they form a continuous chain of volcanic mountains and rift
called mid-ocean ridges that extend throughout the earth’s oceans. MidAtlantic Ridge is good example which runs down the middle of the Atlantic
Ocean. As the plates move apart, magma wells up to fill the space between
them, and this is why divergent plate boundaries are the sites of volcanic
activity. It is also a set where the earth’s crust is growing (Pavico and Faraon,
2007, 194).
What’s More
Activity A: Crossword Puzzle
Directions. Fill out the crossword puzzle with the correct terms using the given
clues.
Across
3
2. Fracture or discontinuity in a volume of
rocks.
4. Plates are moving away from each other.
1
6. Horizontal motion movement of plates.
2
9. A chain of mountains.
8
5
10
4
9
7
6
Down
1. Earth’s crust and uppermost mantle
3. Chain of volcanoes formed from
subducting plates.
5. Plates are moving toward each other
and collide.
7. Occur when flat surface bent or curved.
8. A large landform formed from tectonic
forces.
10. Low area between hills and mountain
Score:
_______
159
Activity B: My Understanding of Plate Movement
Directions. Complete the paragraph below. The first part is already given.
Faults, folding, ridges, mountains, valleys and volcanic arc are formed when
the plates move because
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
_______________________________________________________________________(5 points).
Criteria:
3 points: Appropriateness and relation to the topic
2 points: Neatness and free from grammatical errors.
Score:
_______
Activity C: Plate Boundaries
Directions. Perform the activity below by following the instructions.
A. There are two tables below. Table A includes three types of plate boundaries
with their respective descriptions and illustrations while Table B is blank table
where you can put your answer.
B. Observe Table A by making sure that all the descriptions and illustration
referring to specific type of plate boundaries are properly placed.
C. In case you notice errorrs, rewrite the content of table A into table B with
correct cclassification of all the descriptions.
Table A
CONVERGENT
DIVERGENT
When it occurs between
two oceanic plates, one of
those plates will subduct
beneath the other.
Plates move apart
Two plates are moving
toward each other
TRANSFORM
Most of it are found in the
ocean basin and connect
offsets in the mid ocean
ridges
When it happens, the new
crust is forming from
magma that rises to the
earth surface between the
two plates
Also known as strike slip or Best example of this plate
sliding boundaries
is San Andreas fault
Creating a zone of tension
160
Often sites of major
volcanoes
Table B
CONVERGENT
DIVERGENT
TRANSFORM
Activity D: READ! ASK! RESPOND!
Directions. Read and Analyze the the diagram below. Take note of some important
details which will be used in next activities or questions
READ
ASK
Plates move relative to each other and to fixed location in the
mantle of the Earth. The absolute motion of the plates can
lead to the formation of strings of volcanoes. On the other
hand, their relative motion can lead to the different types of
plate boundaries. If three plates meet in one place, they form
a triple junction (Kasten 2012, 241)
1. What motion or movement can lead to the formation of
strings of volcanoes?
2. What will be formed if the three plate boundaries meet
in one place?
161
1
RESPOND
2.
READ
ASK
READ
Currently, the size of oceans and shape of continents are
changed due to the movement of plates. Because of the
movement of plates in North and South America, Pacific
Ocean is becoming smaller. However, the Atlantic Ocean is
becoming larger as North and South America move away
from Europe and Africa. The Himalayas Mountains are
becoming taller. The plate that includes Australia is now
beginning to collide with the plate that includes Southeast
Asia. India’s plate is also colliding with Asia while Australia
is moving farther away from Antarctica (Kasten 2012, 241).
1. What will happen to the Pacific Ocean if the North and
South American Plates continue to move to the west?
2. What caused the enlargement of Atlantic Ocean?
3. What will happen to the Himalayas Mountains when
two large landmasses, Eurasia and India driven by
plate movement and collide?
1.
RESPOND
2.
3.
Score:
_______
162
What I Have Learned
Directions. From the word pool given below, identify the term being described in the
following statements.
__________1. This phenomenon is created during transformation of plate’s movement
and it is a kinematic phenomenon caused by the relative density of
oceanic lithosphere and relative weakness of asthenosphere.
__________2. This plate’s movement creates mountain and volcanic arc. Marianas
Trench is also created by this movement.
__________3. The movement of this plate is towards the opposite direction or moving
away from each other.
__________4. It is a process of rising up hot, dense liquid materials and creates new
seafloor.
__________5. This is a theory that supports that supports continental drift theory and
seafloor spreading.
Plate Tectonic
Seafloor Spreading
Transform fault
Divergent
Score:
_______
Convergent
What I Can Do
Directions. Supply the needed information by writing it on the space provided.
A. “Everything happens for a reason.” How will I relate the given quotation to
the lesson?
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
163
B. In your area, what natural scenery do you think is a result of colliding
plates?
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
C. How will you justify that plate tectonics or movement of plate boundaries
is also beneficial to us?
(Cite you reference)
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
164
Assessment
Directions. Read and analyze each statement and choose the letter which
corresponds to the correct answer by shading the circle before each number.
⚪ ⚪ ⚪ ⚪
A
B
C
D
1. Movement plate boundaries results too many events or
land formations, which of the following is the reason of
mountain formations.
A. Converging Plates
B. Both A and B
C. Diverging Plates
D. Neither A
⚪ ⚪ ⚪ ⚪
A
B
C
D
2. It is a
A.
B.
C.
D.
⚪ ⚪ ⚪ ⚪
A
B
C
D
3. There are three distinct types of plate boundaries, which of
those types creates zone of tension by moving the plates
apart?
A. Convergent Boundary
B. Transform Fault
C. Divergent Boundary
D. None of these
⚪ ⚪ ⚪ ⚪
A
B
C
D
4. When two tectonic plates collide, the continental crust
usually rise up over the oceanic crust because it is______.
A. Denser than continental crust
B. Thicker than continental crust
C. Thinner than continental crust
D. Less dense than oceanic crust
⚪ ⚪ ⚪ ⚪
A
B
C
D
5. Predict what geologic features could result out of this
boundary.
region where plates meet.
Fault
Plate Boundary
Mountain
Volcanic Arc
165
⚪ ⚪ ⚪ ⚪ 6. Which of the following diagrams shows the strike slip fault
A
B
C
D
wherein San Andreas Fault which is bounded by North
American Plate and the Pacific Plate is the best example?
A.
B.
C.
D.
⚪ ⚪ ⚪ ⚪ 7. Which of the following resulted to the formation of new crust
A
B
C
D
from magma that rises to the earth’s surface between the two
plate boundaries?
A. convergent boundary
B. divergent boundary
C. strike fault
D. transform boundary
⚪ ⚪ ⚪ ⚪ 8. Which of the following resulted to the formation of new
A
B
C
D
oceanic lithosphere?
A. Convergent Boundary
B. Divergent Boundary
C. Transform Boundary
D. None of these
⚪ ⚪ ⚪ ⚪ 9. Which type of plate boundary does the shallow focus
A
B
C
D
earthquake occur wherein it appears to be associated with
mid ocean ridges and mountain ranges?
A. Convergent
B. B. Divergent
C. Transform
D. All of these
⚪ ⚪ ⚪ ⚪ 10. Which of the following land formation or events is not
A
B
C
D
connected to convergent plate movement/margin?
A. deep-focus earthquake
B. Trench
C. Valleys
D. Volcanic Arc
166
⚪ ⚪ ⚪ ⚪ 11. Which of the following is associated with discovery of seafloor
A
B
C
D
spreading?
A. Mountains and Volcanoes are denser than mantle
B. Rotational pole of the earth has migrated or moved.
C. The crust of the continents is denser than the crust of
the ocean
D. The crust of the oceans is very young relative to the
age of the crust of the continents
⚪ ⚪ ⚪ ⚪ 12. Convergent plate boundary creates land formations which
A
B
C
D
later become scenery. Which of the following is one of the best
examples of the land formations due to convergent plate
boundary?
A. Arc
B. Boundary
C. Valley
D. Volcanic Arc
13. Divergent: Plates pull apart_________: Plates move alongside
14. Faults: A fracture or discontinuity in volume of rocks
Folds: ___________________________________.
A. It forms from subducting plates
B. It occurs when flat surface bent
C. Occur when plates moving alongside and toward to
each other.
D. Occur when plates moving alongside and away from
each other.
________________
15. _______: Low area between hills or mountains
RIDGES: A chain of mountains.
CLUE: YLLVAE
Score:
_______
167
Additional Activities
A. Directions. Conduct a short interview with one or two of your family members.
Ask them about how they think the mountain, valley, ridges and volcanoes are
formed. List all their responses. Afterwards, inform them on how those formations
formed based on what you have learned from the lesson.
Interview Guide Format:
Questions
Responses
Your Feedback
B. Based on the results of your interview, make a wide dissemination on how
different landforms were created based on what you have learned into this
module. You have two options to do it.
1. Flyers
2. Vlog which will be post on your social media account.
Rubrics:
5 points: Innovation (It should shows creativity)
10 points: Content (It should include explanations based on the lesson)
168
169
What is it?
What’s More
A.
A
1. Plate
2. Fault
3. Volcanic Arc
4. Divergent
5. Convergent
6. Transform
7. Fold
8. Mountain
9. Ridge
10. Valley
B. Your answer should touch
the three movements of plates.
Divergent, convergent and
transform fault movement.
What’s New
Assessment
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Note: Rubrics is attached after
the activity.
A
B
C
A
Mild Ocean Ridge
B
B
B
D
C
D
D
Transform
B
Valley
What I can Do
C
B.
Students own understanding
or based on research.
What’s in
Words to be crossed out:
Weathering
Mesosaurus
What I Know
D.
1. Absolute motion
2. Triple Junction
3. Smaller
4. North and South America
move away from Europe
and Africa
5. Taller
6.
What I have Learned
1
2
3
4
5
Transform Fault
Convergent
Divergent
Seafloor Spreading
Plate Tectonics
Answer Key
1. B
2. B
3. B
4. A
5. Mountains, Volcanoes,and
Trench
6. B
7. D
8. B
9. D
10. C
11. D
12. A
13. Divergent
14. B
15. RIDGE
References
A. Books
Acosta Herma D.,et al. Science Learners Material Grade 10,2015
Commission on Higher Educvation. Earth and Life Science for Senior High
School. C.P. Garcia Ave., Diliman, Quezon City Philippines. Commission
on Higher Education, 2016
Kasten Lileth P. Secondary Education Curriculum: Integrated Science, 2012
Pavico-Ferriols Josefina and Faraon-Darvin Genevieve, Exploring Life Though
Science: Integrated Science, 2007
Vengco Lilia G. and Religioso Teresita F. You and the Natural World: Integrated
Science, 3rd Edition 2008.
170
Earth and Life Science
Formation of Rock Layers
Earth and Life Science
Formation of Rock Layers
First Edition, 2020
Republic Act 8293, Section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Lucila D. Castor
Editors:
Melanie I. Samudio, Jocelyn M. Manset
Reviewer:
Jason Ricaforte, Angelica Beriña, Princess Paolah L. De Guzman, Marissa C. Betchaida, Louie L. Alvarez
Gregorio M. De Chavez, Jr, Jocelyn M. Manset, Mario B. Maramot, Elaine T. Balaogan, Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan, Merthel M. Evardome, Nadine C. Celindro
Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan, Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
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Cainta, Rizal 1800
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[email protected]
171
Week
5
What I Need to Know
The content of this module focuses on the concepts of rock layer formation and its
correlation. Every rock layer is, for the most part, one of various parallel rock layers
that lies upon another which exhibits specific or similar characteristics.
Since the concept about rocks and its types were discussed in the previous lesson,
this module serves as a continuation of how rocks produce strata and what they may
become once they are separated from its original rock layer. It also involves the
possibilities of knowing the relative age of each rock layer due to the presence of
fossils it contains.
The module is divided into two lessons, namely:
Lesson1: Rock Layers
Lesson 2: Correlation of Rock Layers
After going through this module, you are expected to:
1.describe how layers of stratified rocks are formed;
2. describe the different laws of stratigraphy;
3.determine how geologists correlate rock layers;
4. reflect on human environmental practices that may contribute to the alterations
on the Earth surface, particularly the rock layers; and
5. illustrate an outcrop of rock layers applying the law of stratigraphy.
172
What I Know
Before you use this module, take the Pretest below.
Directions: Read each item carefully. Choose the letter of the best answer and write
the chosen letter on a separate sheet of paper.
1. Which field of science deals with the study of rock layers?
A. Geology
Petrology
B. Paleontology
C. Stratigraphy
2. Which processes most often cause fossil evidence to be preserved in rock?
A. melting and faulting
B. weathering and erosion
C. folding and metamorphism
D. cementation and deposition
3. Which of the following laws of stratigraphy gives emphasis on the
assemblage of fossils embedded on rock layers?
A. Law of Conformities
B. Law of Superposition
C. Law of Faunal Succession
D. Law of Original horizontality
4. What can be concluded if a dike protrudes through several layers of rock?
A. A batholith resides nearby.
B. A volcano is within the area.
C. It is formed before the rock layer.
D. The rock layers are formed before the dike protrudes.
5.What can you infer when a sandstone comes in contact with a granite?
A. The granite is older than the sandstone.
B. The granite is younger than the sandstone.
C. The granite was intruded into the sandstone.
D. The granite and the sandstone have the same age.
6. Who proposed the Law of Uniformitarianism?
A. Aristotle
B. Nicolas Steno
C. James Hutton
D. James Chadwick
173
7. Which principle states that the physical, chemical, and biological processes
that work today are the same forces that worked in the past?
A.
B.
C.
D.
Principle
Principle
Principle
Principle
of
of
of
of
Intrusions
Unconformities
Uniformitarianism
Original Horizontality
For item nos.8-10, refer to the diagram of rock strata to answer the questions
that follow.
8. What principle of stratigraphy is depicted in the picture?
A.
B.
C.
D.
Principle of Unconformities
Principle of Uniformitarianism
Principle of Original Horizontality
Principle of Cross-cutting relationship
9. Which layer of rock is the youngest?
A.
B.
C.
D.
Layer
Layer
Layer
Layer
F
G
E
A
10. What is the correct sequence in the relative age of rock from youngest to
oldest?
A.
B.
C.
D.
Layer
Layer
Layer
Layer
A, B, C, D,
G, F, E, D,
A, B, G, C,
G, F, E, D,
E, F, G
C, B, A
D, E, F
C, B, A
174
11. Which type of dating method can be used in rock layers applying the
Law of Superposition?
A.
B.
C.
D.
Radioactive Dating
Absolute Dating
Relative Dating
Isotopic Dating
12. According to the Law of Superposition, where are the oldest fossils usually
found?
A.
B.
C.
D.
somewhat near the surface
at the top of the rock layers
in the middle of the rock layers
near the bottom of the rock layers
13. Which principle uses dikes and faults in sequencing events?
A.
B.
C.
D.
Inclusions
Faunal succession
Original Horizontality
Cross cutting relationship
14. Which of the following is NOT generally part of angular unconformity?
A.
B.
C.
D.
Erosion
Folding
Metamorphism
Marine Regression
15. How is the principle of original horizontality described?
A.
B.
C.
D.
All rocks were originally horizontal.
Each layer of rock is older than the one above it.
The original crust of the earth was almost perfectly flat.
Layers of sediments are deposited in a nearly horizontal
orientation.
175
Lesson 1 Rock Layers
Are the current features of the Earth the same as they were 4.6 billion years ago?
Well, the answer is no. The Earth had undergone geological alterations and
evolutionary processes that changed its features. The exogenic and endogenic
processes that happened in the surface and within the inner portion of the Earth
may contribute to these alterations that occurred. The rocks are being studied by
geologists because they contain clues of what the Earth had been in the past.
In this module, the formation of rock strata will be determined including the order of
rock layers, the manner on how rock layers are formed or deformed due to physical
factors and the age of rocks using the relative and absolute dating method.
What’s In
Before proceeding to the content of this module, let us first have a review on the
learnings that you gained in our previous lesson related to rocks and rock cycle.
Try to complete the rock cycle using the terms and the processes given. Write the
term/s in the box/circles and processes/events in between arrows to show the
connections in the rock cycle.
176
What’s New
If you will be given a cake for your birthday, how many layers do you wish to have?
How many flavors do you want? What will be the order of flavor in each layer?
If you apply pressure on cakes, it will be deformed, flattened, or twisted. Just like
the layers in the cake, rocks can also form layers due to sediments deposited on
rocks or some forces that act on it which causes its deformation. These are forces
that may bring alteration to rock layers or the change in its formation in the Earth’s
surface.
In geologic time, it covers the whole sweep of Earth’s history, from how and when the
earth was first formed, to everything that has happened on, in, and to the entire
planet up to now.
In this module, descriptions, characteristics, and behavior of rock layers will be
discussed. Relevant information will be given which serves as a guide as you go
through with the lesson in the formation of rock layers.
What is It
The idea behind the concept that the Earth is billions of years old originated in the
work of James Hutton. Hutton concluded that there are forces that changes the
landscape of the Earth in the past. This conclusion is based on his observation in
the geological processes that were taking place in his farm.
His Principle of Uniformitarianism states that the current geologic processes, such
as volcanism, erosion, and weathering are the same processes that were at work in
the past. This idea was refined by other geologists that although the process of the
past and the present are the same, the rates of this process may vary over time. The
Earth’s history was studied using the different records of past events preserved in
rocks. The layers of rocks are like the pages in our history books.
How are rock layers formed?
Stratified rocks, also known as derivatives rock, maybe fragmental or crystalline.
These rocks are product of sedimentary processes. These are made of visible layers
of sediments. The formation on rock layers depend on its stratigraphy and
stratification.
177
Stratigraphy
Stratification
It is also known as bedding, which
is the layering that happens in
sedimentary and igneous rocks
formed at the surface of the Earth
that comes from lava flows or other
volcanic activity.
It is expressed by rock layers
(units) of a general tabular or
lenticular form that differ in rock
type.
It is the branch of geology that
deals
with
the
description,
correlation, and interpretation of
stratified sediments and stratified
rocks on and within the Earth.
It is the study of the rock
layers(strata).
It will give you clues to the location
of ancient seas, mountains,
plateaus and plains.
As early as the mid 1600’s, the Danish scientist Nicholas Steno studied the relative
position of sedimentary rocks. Sedimentary rocks are formed particle by particle, bed
by bed, and the layers are piled one on top of the other. These rock layers are also
called strata.
Stratigraphic Laws
Stratigraphic laws are basic principles that all geologists use in decoding or
deciphering the spatial and temporal relationships of rock layers. These includes the
following: Original Horizontality, Lateral Continuity, Superposition, Cross Cutting,
Law of Inclusions and the Law of Faunal Succession.
178
Law of Superposition
The largest and heaviest rock
layer that settled first at the
bottom is the oldest rock layer.
The lightest and smallest that
settled last is the youngest rock
layer.
Law of Inclusions
A rock mass that contains
pieces of rocks called
inclusions are younger
than
the
other
rock
masses.
LAWS OF
STRATIGRAPHY
Law of Cross Cutting
Relationship
a fault or dike- a slab rock
cuts through another rock
when magma intrudes to
the rock, that fault or
magma is younger than the
rock
Law of Unconformities
rock layers that are formed
without
interruptions
are
conformable.
describes a layer of rock that
have been deformed or eroded
before
another
layer
is
deposited, resulting in rock
layer mismatching
Law of Original
Horizontality
sediments are deposited in
flat layers, if the rock
maintains in horizontal
layers, it means it is not
yet disturbed and still has
its original horizontality
Law of Faunal Succession
first
Smith
recognized
by
William
different
strata
contain
particular assemblage of fossils
by which rocks may be
identified and correlated over
long distances
Figure 1. The Steno’s Law of Stratigraphy
179
The Law of Stratigraphy shown -in Figure 1 indicates deposition, reshaping and
deformations of the rock layers due to geological processes.
Three Types of
Unconformities:
Disconformity
Angular unconformity
It originates from horizontally
parallel strata of sedimentary
rock that are deposited on
tilted and eroded layers.
It
produced
an
angular
discordance with underlying
horizontal layers.
It originates from horizontal
sedimentary rock layers that is
lifted and the top layers eroded.
New sediments are deposited
when they are submerged
beneath
a
freshwater
or
saltwater.
Non -conformity
It originates between sedimentary
rocks, metamorphic or igneous rock
when sedimentary rock lies above
and was deposited on the pre-existing
and eroded metamorphic or igneous
rock.
180
What’s More
Activity 1.1 - Who’s Older, Who’s Younger?
The rock layers below labelled A to F undergo sedimentary process that results to
changes in rock form. Use the diagram of a rock layer below to complete and answer
the questions.
Guide Questions:
1. In what layer was the first rock formed?________
2. What letter is the second layer of the rock? ________
3. What happens in the rock represented by letter D?(cutting,or insertion)_______
4. What three layered letters is cut by letter D? ________
5. What takes place in letter F?(fault,folds) ________
6. What environmental factors occur in letter E?(weathering and erosion,
volcanic eruption) ________
7. Which rock layer is the oldest? ________
8. Which rock layer is the youngest? ________
9. Which layer describes the law of horizontal continuity? ________
10. Which layer shows an angular conformity? ________
181
Activity 1.2 Word Pool
Read the words in the box and the statements below.
words/phrases that best complete the sentences.
cross-cutting
erosion
extrusive
fault
intrusion
Fill the blanks with the
sedimentary
stratification
superposition
unconformity
younger
1. The process in which sedimentary rocks are arranged in layer is called
______________.
2. The law of _____________ relationship happens when a layer of rocks torn apart
and igneous rock fill in the spaces.
3. On the Earth’s surface, weathering and _________ make rock fragments.
4. The law of _____________states that sedimentary rocks are layered from the
oldest to the youngest and oldest rocks are found at the bottom.
5. A/an _________ is a break in the rocks that make up the Earth’s crust, along
which rocks on either side have moved past each other.
6. A/an ___________ rock is formed when a magma never makes it to the surface.
7. In the law of ___________, rock was uplifted, eroded from the surrounding rock,
and will be replaced by sediments.
8. A/an _________ rock is formed by the accumulation, deposition, and cementation
of organic particles or minerals.
9. When lava solidifies upon reaching the surface, it usually forms a/an
______________rock in rock layers.
10. Rock that form intrusions on other rocks is ________ than the other rock layer.
182
Activity 1.3 Match it!!!
Match the descriptions in Column A with the terms in Column B. Choose the letter
of the correct answer.
COLUMN A
1. Unconformities were sedimentary
rock layers that are tilted forms a
wave or angle in rock layers.
2. Rock layers contains embedded
fossils by which rock maybe
identified.
3. Magma intrude to the rocks, this
magma is younger than the rock.
4. Exist between sedimentary and
metamorphic
rocks
when
sedimentary rocks lie above and
were deposited in the pre-existing
and eroded rocks.
5. Largest and heaviest rock layer that
settled first at the bottom is the
oldest rock layer:
COLUMN B
A. Superposition
B. Angular conformity
C. Cross cutting relationship
D. Faunal Succession
E. Non conformity
Activity 1.4 Brain Pop
Study the rock strata in the right and try to answer the questions in the left.
1. What geologic process takes place in
cracks or breaks in the rock?
2. If an igneous rock is introduced in
the breaks, what law of stratigraphy
best explains this occurrence?
3. How will you characterize the dikes
in the cracks, is it older or younger
than layer F?
4. What law best describes the position
of rock layers in layer A to F
5. Which is younger, layer F or the intrusions in the rock?
183
Lesson 2
Correlation of Rock Layers
Have you experienced playing or fitting cut out patterns or puzzle?
One of the evidences used by geologist in tracing the history of the Earth was with
the identifications and the correlations of rock layers. Rock layers were subjected to
alteration due to different geologic processes that act or apply on it. Such forces could
result to tilting, uplifting, compression, and subductions of rock layers. These rock
layers have the tendency to be separated from each other. One way of how these
rock layers be identified is with the utilization of correlation.
Why do geologists need to correlate rock layers?
The history of earth is preserved in its rock layers. Unfortunately, no single location
on earth has a continuous set of layers due to erosion or ceased deposition. Instead,
geologists study rock sequences at many different places around the world, measure
the depth of the layers, record what kind of rock is in each layer, and see if there are
any fossils present. Geologists represent the layers of rock by drawing a picture of
the sequence – this is called a stratigraphic column.
Geologists need to correlate rocks from one place to another to get more complete
record of Earth’s history over time. They try to determine the relative age of widely
separated strata or rock layers. They used correlation trying to fit together
sedimentary strata in different places just like a cut out puzzle.
What’s In
In the previous lesson, you had learned that rock layers may undergo different
formations due to several geologic process taking place in each rock layer. These
concepts of stratigraphy are all stated in the Steno’s Law of Stratigraphy.
Let us find out if you can still remember how this law can characterize each rock
layer pictured below. Identify the pictures which is best explained by the Laws of
Stratigraphy in the box below. Choose the letter of the correct answer.
A. Original Horizontality
B. Cross Cutting Relationship
C. Lateral Continuity
D. Superposition
E. Unconformity
184
What’s New
How do geologists correlate rock layers?
The process of showing that rocks or geologic events occurring at different locations
are of the same age is called correlation. Geologists have developed a system
for correlating rocks by looking for similarities in composition and rock
layer sequences at different locations.
The geological technique of correlation provides information that have taken in
Earth’s history at various time that occurred. There are different methods in
correlating rock layers, these includes:
1. Rock types and its characteristics
color, texture, hardness, composition or its mineral content
the harder and more densely packed the particls are, the older the rock
and the deeper the layer it came from.
2. Index fossil
also known as guide fossils or indicator fossils, are fossils used to define
and identify geologic periods (or faunal stages)
3. Bed rock
a deposit of solid rock that is typically buried beneath soil and other
broken or unconsolidated material (regolith).
made up of igneous, sedimentary, or metamorphic rock, and it often
serves as the parent material for regolith and soil.
185
How to match correlated rock layers?
Matching of rock layers may be determined by merely looking at its features. Look at
the three columns of rock layers below. Let us determine how they are correlated.
Figure 2. Stratigraphic Column in Different Location
These three columns represent rock layers from three separate locations or outcrops.
Some columns may be missing layers due to erosion. No single column represents a
complete record. Your job is to line them up so a complete record of the region can
be seen. Find one or more layers present in all columns that can be matched like a
puzzle.
Figure 3. Stratigraphic Column Matching up of Rock Layers
Figure 4. Strategic Column Fitting of the Rock Layers
186
After matching correlated rock layers, we can determine the relative age of each layer
according to the law of superposition. Limestone in location A is the oldest and
limestone in location C is the youngest rock layer. While those rock layers having
the same composition, textures, and fossil content were considered as rock layers
with the same age.
In matching up rock layers, superposition and cross-cutting are helpful. When rocks
are touching one another, the lateral continuity rock layers aid to match up with the
layers that are nearby. Geologists then match, or correlate, the different shorter
sequences to create a geological column that spans further back into earth’s past.
Correlations involve matching a particular rock unit in one exposure with its
counterpart at a different locality. By correlating various rock vulnerability separated
by great distances, geologic maps can be constructed and the original geographical
extent of the rocks can be estimated.
Types of Correlation
A) Physical Correlation is accomplished by using number of criteria such as color,
texture, and types of minerals contained within a stratum which make it possible
for geologists to classify a particular stratum specifically.
B) Fossil Correlation is a principle that geologists use to determine the age of rock.
It uses fossil with unique characteristics, such as geologically short lifespan and
easily identifiable features and use this information to estimate the age of a rock
layer in other areas that contain the same type of fossil or group of fossils.
There are fossils which are used to date the layers of rock that they are found in.
Fossils that can be used in this way are called index fossils, and rock layers with
the same index fossils in them can be correlated.
Criteria to be considered in identifying index fossils includes:
187
1. The fossilized organism must be easily recognizable and it must be easy to identify
because of its uniqueness.
2. Fossils must be geographically widespread, or found over large areas so that it can
be used to match rock layers separated by huge distances.
3. Fossils must have lived for only a short time, so that it appears in only horizontal
layer of sedimentary rocks.
What’s More
Activity 1.5 Mind Tickle
A. Look at the columns of rock layers. Analyze each figure and answer the
questions that follow.
Analysis:
1. Arrange the rock layer from oldest to youngest. Use the number in the
designated rock layers.
Youngest _____
_____
_____
_____
_____
_____
_____
Oldest
_____
2. Is the intrusion of igneous rock younger or older? _________
3. What rock layer is common in each rock column? _________
188
4. What environmental condition takes place in rock layer no.3? (fault, erosion)
5. In what earth’s feature is the rock layer in outcrop C probably located?
(volcano, sea)
6. Which outcrop/s show examples of unconformity? ___________
7. What type of igneous rock maybe deposited in outcrop C? (batholith, granite)
8. Which layer is considered as the beds? ___________
9. Which outcrop/location shows subsidence? _______
10. What geologic process happens in outcrop B? (folding, fault)
B. Building Vocabulary Words
Unscramble the letters of the term/s being described by the given statement.
TERMS
1. N T U I S O I R N
2.D X N E I S S O F L I
DESCRIPTIONS
It is the action of process of forcing body of igneous rock
between sedimentary rocks.
3. N E O R I S N O
- It is used to define and identify geologic periods.
-The action of surface processes that removes soil, rock,
or dissolved material from one location to another.
4.K R O C Y S R L E A
It is made up of sedimentary and igneous rock that
was formed at the Earth’s surface.
5.N O R L T O I E C R A
The process of showing that rocks or geologic events
occurring at different locations are of the same age.
What I Have Learned
Activity 1.6 Sum It Up!!!
Read the statement in each item and choose the correct answer in the parenthesis.
Identify the law or principle of stratigraphy being described by the given statement.
1. A piece of granite contained within a sandstone would be (older, younger)
than the sandstone.
This is an example of the Principle of ______________________________________.
189
2. A fault cutting through a series of layers of rocks is (older, younger) than the
rock layers.
This is an example of the Principle of ______________________________________.
3. In a series of layers, the youngest layer is on the (bottom, middle, top) of the
sequence.
This is an example of the Principle of ______________________________________.
4. Sedimentary rocks that are folded must be (older, younger) than the forces
which deformed them.
This is an example of the Principle of ______________________________________.
5. In undisturbed layers of rocks, sediments that form sedimentary rock are
deposited in horizontal layers that are (younger, older)
This is an example of the Principle of ______________________________________.
Things to Ponder
Most sedimentary rocks are laid down in flat, horizontal layers.
Stratigraphy is the science that deals with characteristics of layered rocks
and how these rocks are used to trace the history of the Earth.
Stratification is the layering that happens in sedimentary and igneous rocks
which formed at the surface of the Earth that comes from lava flows or other
volcanic activity.
Rock layers are called strata.
Law of cross-cutting relationships happens when a fault or dike or magma
that intrudes into the rock, is younger than the rock.
Law of inclusions is when the rock mass with inclusion is younger.
Law of original horizontality is a flat rock that maintains its horizontal layer
without being distracted for a long period of time.
Law of superposition states that older rock layer is found at the bottom while
younger rock layer is found at the top.
Law of faunal succession states that different rock layers contain particular
fossils by which the rocks may be identified and correlated.
Law of unconformity implies a substantial gap or break in rock layer
sequence due to uplift and erosion.
Index fossil are fossils used to define and identify geologic periods.
190
What I Can Do
From the lists of human activities/practices, tell how these practices may trigger the
alterations of rock layers.
Human Activities/Practices
How it will affect the rock layers?
1. Mining
2. Quarrying
3. Kaingin system of farming
4. Converting elevated areas into
subdivisions and roads
5. Forest denudation
Analysis:
1. Which in the list of human practices can be considered as detrimental to
human and other living things?
2. What will be the impact of this human practices in geological processes
such as weathering and erosion?
3. How will you address the result of these practices and its magnitude to the
government since your generation are considered as the hope of the motherland?
191
Assessment
Directions: Read each statement and choose the letter of the correct answer.
1. What is the relative position of oldest rock layer as stated in the principle
of Superposition?
A. at top
B. at the bottom
C. at the middle
D. at random location
2. Which process is involved when sedimentary rocks are arranged in layer?
A. Foliation
B. Deposition
C. Sedimentation
D. Stratification
3. Which term in the list is associated with rock layers?
A. Defoliation
B. Extrusion
C.
Intrusion
D. Strata
4. What type of rock/s usually undergo cross- cutting on rock layers?
A.
Igneous Rock
B. Stratified Rock
C. Sedimentary Rock
D. Metamorphic Rock
5. Why is there a need for correlation of rock layers?
A.
It provides information that the rock layers are connected to each
other long ago.
B. Fossils embedded in the rock layers serve as a proof of their
correlation.
C. It gives the relative age of the rocks.
D. All of the above
192
6. Which principles describes that geological processes operating at the
present time are same processes that have operated in the past?
A. Cross-cutting relationship
B. Original horizontality
C. Uniformitarianism
D. Inclusion
7. Which of the following shows a method of correlation?
A.
sequence of mineral content on rock
B. similarity of rock types
C. presence of index fossil
D. all of the above
8. If an igneous rock A cross cuts sedimentary rock B, what will be the
relative age/position of igneous rock A?
A.
Igneous rock A will be on top of rock B.
B. Igneous rock A is older than sedimentary rock B.
C. Igneous rock A is younger than sedimentary rock B.
D. Igneous rock A is at the same age with sedimentary rock B.
9. Which of the following is NOT a type of unconformity?
A. Angular
B. Uniformity
C. Disconformity
D. Nonconformity
10. When sedimentary rocks deposited in flat layers are left undisturbed it
follows the statement in which of the given principles?
A. Cross-cutting Relationship
B. Original Horizontality
C. Fauna Succession
D. Superposition
193
11. What can be inferred if you find an outcrop of mud cracks in gray shale?
It can be inferred that the area was once ________.
A.
a beach
B. a desert
C. a tidal flat
D. deep under the ocean
12. Which of the following occurrences alter rock layer quickly?
A. earthquakes
B. rivers
C. snow
D. rain
13. What makes index fossils so useful in identifying the relative age
of rocks?
A. They are short-lived.
B. They are radioactive.
C. They are old enough to be analyzed.
D. They are present in both young and older rocks.
14. Which type of conformities state that sedimentary rocks, when tilted or
folded, are overlain by more flat- lying layer of rock?
A. Angular Conformity
B. Disconformity
C. Nonconformity
D. Inclusion
15. What will be the position of the youngest beds in an undisturbed
sedimentary deposits?
A. They stay at the bottom.
B. They are found on the top rock layer.
C. Youngest beds are separated from sedimentary deposits.
D. Neither b or c
194
Additional Activities
Illustrate an outcrop of a rock layer applying the principle or the laws of stratigraphy
similar to your previous activity. Use the legend of what will be present in these
particular layers in the outcrop. The guide of what you’re going to put in your outcrop
are found in the table below. Indicate them in your outcrop or block diagram. Be
creative in presenting your output. Place your illustration in the box.
Label
Description
Lost before tilt
This was the last layer to be formed before the rocks
tilted.
Oldest rock
The rock layer is below all the others.
Youngest rock
This is the younger rock above all the others.
Second oldest rock
The rock layer is just above the oldest.
Thinnest rock
It is the thinnest rock layer found between the fifth and
the third rock layer
Above the erosion
This layer forms on top of earlier rocks after it was tilted
and eroded away.
=
195
196
1. Intrusion
2. Index fossil
3. Erosion
4. Rock layers
5. Correlation
What I’ve Learned
1. Unconformity, younger
2. Cross cutting, younger
3. Superposition, top
4. Angular conformity
5. Original horizontality,
younger
Assessment
1. B
2. D
3. C
4. A
5. D
6. C
7. D
8. C
9. D
10. B
11. D
12. A
13. D
14. C
15. B
ACTIVITY 1.2
1. Stratification
2. Cross-cutting Relationship
3. Erosion
4. Superposition
5. Fault
6. Intrusion
7. Unconformity
8. Sedimentary
9. Extrusive
10. Younger
ACTIVITY 1.3
1. B
2. D
3. C
4. E
5. A
Activity 1.4
1 Fault
2. Cross cutting
3. Younger
4. Superposition
5. Intrusion is younger
LESSON 2: CORRELATION
What’s In
1. D
2. A
3. E
4. C
5. B
ACTIVITY 1.5 A
Youngest - 6
4
1
7.9
2
10
3
5
Oldest
8
2. Younger
3.Layer 7
4.Erosion
5.Volcano
6.Location C & D
7.Batholith
8.Layer 8
9.Location A or Outcrop A
10.Folding
LESSON I: Rock Layer
What I Know
1. D
2. D
3. C
4. A
5. A
6. C
7. C
8. D
9. B
10. B
11. B
12. D
13. D
14. C
15. D
ROCK LAYER
What’s in
1. Magma
2. Solidification
3. Igneous Rock
4. Weathering and Erosion
5. Sediments
6. Deposition and burial
7. Weathering and erosion
8. Sedimentary rock
9. Weathering and erosion
10. Metamorphism
11.Metamorphic Rocks
12.Heat and pressure
13.Melting
14.Weathering and erosion
What's More
ACTIVITY 1.1
1. B
2. A
3. Cutting
4. C,A,B
5. Fault
6. Erosion
7. A
8. E
9. C
10. B
Answer Key
ACTIVITY 1.5 B
References
BOOK
Olivar II, Tolentino, Jose et al. 2016. Earth Science. Phoenix Publishing House
ELECTRONIC RESOURCES
Astro, accessed February 18,2019,
http://astro.hopkinsschools.org/course_documents
Global, accessed May 20,2020,https://global.oup/us/companion.websites
Introduction to Stratigraphy, accessed February 19,2019,
http://grandcanyonnaturalhistory.com/pages_nature/geology/intro-tostrata.html
Natural Trust for Historic Preservation, accessed February 19, 2019,
https://savingplaces.org/place/grand-canyon#XGyrBh7mgSw.html
Nature, accessed February 19,2019,https://www.nps.gov.nature
Quora, accessed February 19,2019,http://ww.quora.com
Relative Rock Layers, Science Learning Hub, accessed May 31, 2020,
https://www.sciencelearn.org.nz/labelling_interactives/4-relative-rocklayers
Rocks and Layers, USGS, accessed February 18,2019,
http://pubs.usgs.gov/gip/fossils/rocks-layers.html
Sedimentary Rock, accessed February 19,2019,
https://en.m.encyclopedia.org.wiki>sedimentary/rock
Stratification, Encyclopedia Britannica, accessed February 19,2019,
http://www.britannica.com/science/stratification-geology
Stratum, Wikipedia, accessed February 18,2019,
https://en.m.wikipedia.org/wiki/stratum
Stratified Rocks, accessed May
20,2020,https://mindat.org/glossar/stratified_rocks
197
Earth and Life Science
Relative and Absolute Dating
Earth and Life Science – Senior High School
Relative and Absolute Dating
First Edition, 2020
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However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Lucila D. Castor, Arrah S. Sulit
Editors:
Melanie I. Samudio, Jocelyn M. Manset
Reviewer:
Jason Ricaforte, Angelica Beriña, Princess Paolah L. De Guzman, Marissa C. Betchaida, Louie L. Alvarez,
Gregorio M. De Chavez, Jr, Jocelyn M. Manset, Mario B. Maramot, Elaine T. Balaogan, Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
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198
Week
6
What I Need to Know
This module was designed and written with you in mind. It is here to help you
master the different methods in determining the age of stratified rocks. The scope
of this module permits it to be used in many different learning situations. The
language used recognizes the diverse vocabulary level of students. The lessons are
arranged to follow the standard sequence of the course. But the order in which you
read them can be changed to correspond with the textbook you are now using.
The module covers:
Lesson 1 – Relative and Absolute Dating
After going through this module, you are expected to:
1. differentiate relative from absolute dating through pictures presented; and
2. compare relative and absolute dating using comparison chart.
What I Know
Directions. Read the following questions and choose the letter of the correct
answer. Write the chosen letter on a separate sheet of paper.
1. Which of these is the best indication of the relative age of a rock layer?
A.
B.
C.
D.
the
the
the
the
thickness of the layer.
chemical make-up of the layer.
distance of the layer on the surface.
position of the layer compared to other layers.
2. The absolute age of an igneous rock can best be determined by ___________.
A. examining the environment in which the rock is found
B. examining the rock’s relative position in a rock outcrop
C. comparing the amount of decayed and undecayed radioactive
isotopes
D. comparing the size of crystals in the upper and lower parts of the
rock
3. In an undisturbed rock file, the oldest rock is found______________.
A.
B.
C.
D.
on the topmost
at the bottom
upper part
lower part
199
4.The principle of horizontality is based on the observation that sediment usually
accumulates in _______________ layers.
A. horizontal
B. straight
C. vertical
D. round
5, Which of the following makes use of the position of rocks to determine its age?
A.
B.
C.
D.
Relative Dating
Absolute Dating
Radioactive Dating
Radiometric Dating
6. Which type of dating method can be used on rock layers by applying the Law of
Superposition?
A.
B.
C.
D.
Relative Dating
Absolute Dating
Radioactive Dating
Radiometric Dating
7.Which was the first method used to determine ages of rock and fossils?
E.
F.
G.
H.
Relative Dating
Absolute Dating
Radioactive Dating
Radiometric Dating
8. What is the difference between an absolute date and a relative date?
A. An absolute date refers to a year or a range of years while a relative
date indicates a chronological order.
B. A relative date is derived from radiometric dating techniques while
an absolute date comes from guesswork.
C. A relative date refers to a year or a range of years while an absolute
date indicates a chronological order.
D. An absolute date involves testing of sedimentary rocks while relative
date involves testing of igneous rocks.
200
Refer to the diagram below and answer the questions that follow.
9. Which layer of the rocks follows the principle of superposition?
A. Layer 1
B. Layer 3
C. Layer 4
D. Layer 6
10. Which layer of the rocks shows the cross-cutting relationship?
A.
B.
C.
D.
Layer
Layer
Layer
Layer
1
3
4
6
11. What method of Rock Dating is used in giving rocks an actual date?
A.
B.
C.
D.
Relative Dating
Absolute Dating
Historical Dating
Geological Dating
12. Which of the following is NOT true about Relative Dating?
A. quantitative method of dating
B. principles to recognize the relative ages of rocks
C. used stratigraphy method (oldest found at the bottom and youngest a
the top)
D. used to arrange geological events and the rocks they leave behind in
sequence
13. Which of the following is a principle of Relative Dating?
A.
B.
C.
D.
Principle of Half-life
Principle of Layering
Principle of Superposition
Principal of Floral Succession
201
14. Which of the following is NOT true about Absolute Dating?
A.
B.
C.
D.
quantitative method of dating
principles to recognize the relative ages of rocks
used to give rocks an actual date or date range, in number of years
use radiometric method by radioactive decay: concept of isotopes and
concepts of half- life
15. What method of Rock Dating is using stratigraphy method?
A.
B.
C.
D.
Relative Dating
Absolute Dating
Historical Dating
Geological Dating
Lesson 1 Relative and Absolute Dating
How old is it? This might be the first question that will enter your mind when you
see an old rock or artifact. Certainly, that is one of the first thing that a geologist
wants to know.
Geologists find ways on how to determine the age and traces of history from the
large number of artifacts and monuments bestowed upon us by older civilization.
There are methods and techniques used by geologists to help them determine the
age of the materials that evolved in the past. In this lesson, the relative and absolute
dating processes will be discussed.
202
What’s In
Activity 1: Solving the Earth’s Puzzle!
Directions. Find and encircle relevant words from the puzzle. Then, write an
appropriate sentence using the identified words.
A
D
M
A
B
C
A
D
E
F
R
F
H
H
G
B
A
F
F
O
S
S
I
L
S
B
S
E
C
R
A
O
R
O
S
U
N
K
E
R
T
Z
L
P
L
D
S
L
A
I
Y
U
I
I
F
A
A
G
E
S
T
O
T
I
J
T
L
A
Y
E
R
S
N
H
I
S
T
O
R
Y
O
D
T
V
U
S
A
N
O
C
C
O
E
A
R
T
H
R
O
Guide Questions:
1. How did you find the activity?
2. What are the difficulties encountered in finding words? How about in
making a sentence?
3. Can we relate solving puzzle in solving the history of Earth? How?
What’s New
We have learned that geologic time is measured in two ways: relative and absolute
age. Relative date or age measurement refers only to the order in which events
occurred. On the other hand, absolute age is age in years. It tells the order in which
events occurred and the exact amount of time that has passed since they occurred.
203
Activity 2: What’s in the Stack of Rock?
Directions. Look at the diagram of a rock layer. Focus on the sediment layer.
Figure 1. Sedimentation
Guide Questions:
1. How will you describe the rocks in the illustrations?
2. What is/are the use/s of this layering to the geologists?
3. At which pile of rock can you find the oldest? youngest?
Justify your answer.
4. Can you determine the relative age of the rock based on the layering?
How about absolute age?
5. What does the thickness of each layer indicate?
204
What is It
Relative Age
Prior to absolute age measurements, geologist used
field observations to determine the relative ages.
They used simple principle in order to get the
relative ages. The following are the principles used
by the geologists:
The principle of original horizontality is based on
the observation that sediment usually accumulates
in horizontal layers. Tectonic forces tilted or folded
rocks into an angle after it was formed.
Figure 2. Horizontal layers
The principle of superposition states that
sedimentary rocks become younger from bottom to
top. This is because younger layers of the
sedimentary always accumulates at the top of the
layers. In figure 4, rocks number 5 are oldest and
rocks in 1 are the youngest.
The principle of crosscutting relationships is
based on the fact that rocks must exist before
anything else happened like intrusions or dikecutting across rocks. In figure 5, the cut rock layers
are older than the rock that cuts across them.
The principle of faunal succession states that
species succeeded one another through time in a
definite and recognizable order and that the
relative ages of sedimentary rocks can be therefore
recognized from their fossils. The absence or the
presence may be used to give a relative age of the
sedimentary where they are found.
Figure 4. Tiltation after
deposition into horizontal
layers
Figure 5. The principle of
superposition
The principle of lateral continuity explained
that layers of sediment are continuous. Layers
with same rocks but separated by a valley or
erosion are initially continuous.
Figure 6. Horizontal
layers with dikes
205
Activity 3: A. Who’s the Oldest?
Directions. Use the letters in the diagram below to determine the age of rocks
applying the method of relative dating. List the rock layers from youngest to the
oldest relative to age.
Figure 7. Rocks layers and dikes
Guide Questions:
1. In the law of superposition, which layer is the oldest?
__________________________________________________________________________
_
2. What is the relative age of igneous rock in layer H? (younger or older)
____________________________________________________________________
_
3. What is the youngest rock layer?
____________________________________________________________________
_
4. What law/principle is represented by layer H as it passes through layer
M, F, B, and I?
____________________________________________________________________
_
5. Which rock layer is older, layer B or layer F?
____________________________________________________________________
206
B. How many years?
Directions. Refer and analyze the diagram below to answer the provided questions.
Figure 8. Rock Layers and Fossils
1. How old was the youngest rock layer?
__________________________________________________________________
2. How about the oldest rock layer?
__________________________________________________________________
3. What method is used in determining the age of rocks and fossils
based on the diagram?
Absolute Age
Since change is the only thing that is permanent, the measurement of absolute age
or exact date became a challenging task to the scientists. But they found a natural
process that occurs at constant rate and accumulates its record of the radioactive
decay of elements in rocks.
Radioactive elements decay because they are composed of unstable isotopes that
decompose spontaneously. Each atom has a certain probability of decaying at any
time. It has half-life or time for it to decompose into half.
Radioactivity is not affected by geologic process and easily measured in the
laboratory. Aside from those, daughter isotopes accumulate in rocks. The longer the
rock exists, the more daughter isotopes accumulate. The process of determining the
absolute ages of rocks and minerals by measuring the relative amounts of parent
and daughter isotopes is called radioactive dating.
e.g. a form of uranium changes (decays) to lead
207
In the previous example, the parent element is uranium (U) and the daughter
element is lead (Pb).
Again, the process of radioactive decay can be used for dating rocks because:
Radioactive decay proceeds at a constant, regardless of changes in conditions such
as temperature, pressure, or the chemical environment.
Here are the commonly used radioactive isotopes in radioactive dating.
Table 1.1 Some Used Isotopes for Radiometric Dating
Parent
Daughter
Half-life
Effective
Materials that
Isotope
Isotope
(Years)
Dating
Can be Dated
Range
Using this
(Years)
Isotope
Carbon-14
Nitrogen-14
5730
100-50000
Wood, shells, or
anything that
was once alive,
Trapped Carbon
dioxide
Potassium-40
Argon-40
1.3 billion
40,000-4.6
Muscovite
Calcium-40
billion
Biotite
Volcanic rock
Uranium 238
Lead 206
4.5 billion
10 millionZircon
4.6 billion
Uranium 235
Lead 207
710 million
10 millionUranite
4.6 billion
Half-Life
It is almost impossible to say when the last of the parent atoms will decay,
but the time taken for half the atoms to decay is comparatively easy to
predict. The half-life of a radioactive decay process is the time taken for half
the original parent atoms to decay.
The length of half-life is a unique feature of each decay process. The half-life
of the uranium is 713 million years. This means that if an igneous rock
contained 1000 atoms of U-235 when it solidified:
After 713 million years, it would contain 500 atoms of U-235 and 500 atoms
of the daughter element for the decay process, Pb-207.
The proportion of parent atoms/daughter atoms present in an igneous rock
gives the age of the rock — or the number of million years since the rock
solidified
208
What’s More
Activity 4: Relative vs. Absolute
Age of rocks can be determined by using two methods. These methods are absolute
and relative dating.
Directions. Complete the concept map to show the differences between the two
methods of dating.
Relative Dating
Absolute Dating
Used to arrange geological
events, and the rocks they leave
behind in sequence
Used absolute dating methods,
sometimes called numerical
dating,to give rocks an actual
date,or date range, in number of
years.
________ method of dating
________ method of dating
Used ___________
Use _________ method by
radioactive decay: concept of
isotopes and concepts of half- life
method (oldest found at the
bottom and youngest at the top)
209
Activity 5: Read and Fill!
Directions. Place the missing letters that best complete the term being described
by each statement.
1. It is used to determine the age of a
material by using numeric values.
__b__ __l u__ e D __ __i__g
2. It states that the geologic feature
which cuts another is younger of
the two features.
3. It is used to determine the relative
age of rock layers.
C__o__s C__t__i __g
R__la__ i __ e __a__i__g
4. This law states that the younger
layer is at the top and older layer of
rocks are at the bottom.
5. These are rocks that usually form
deposits
that files up and
hardened.
__up__r__o__i__i__n
Se__im__nt__ry __ o__ks
What I Have Learned
1. In determining the age of rocks in relative dating, it follows the different
principles such as:
,
,
and
.
2. ____________ dating is used to arrange geological events, and the rocks
they leave behind in sequence.
3.
dating is used to give rocks an actual date, or date
range, in number of years.
4. Relative dating uses stratigraphy method while absolute dating uses
method by radioactive decay.
5. The
of a radioactive decay process is the time taken
for half the original parent atoms to decay.
WORD POOL
Relative
Radiometric
Doubling
Absolute
Crosscutting
Half-life
Superposition
Stratigraphy
Isotopes
210
Original Horizontality
Lateral Continuity
Faunal Succession
What I Can Do
Activity 6: Venn Diagram
Directions. Fill in the Venn diagram to show the similarities and differences
between absolute dating and relative dating. Use the words inside the word pool to
complete the diagram.
Word Pool
use of numeric
value
qualitative method
quantitative method
use the position
of rocks
radiometric method
stratigraphic method
used to tell the age of
rocks
use sedimentary rocks
give an idea of the order
of geologic events
does not give the true age
of rocks
211
Assessment
Directions. Read the following questions and choose the letter of the correct
answer. Write the chosen letter on a separate sheet of paper.
1. Which type of dating method can be used on rock layers by applying the
Law of Superposition?
A.
B.
C.
D.
Relative Dating
Absolute Dating
Radioactive Dating
Radiometric Dating
2. Which was the first method used to determine ages of rock and fossils?
A.
B.
C.
D.
Relative Dating
Absolute Dating
Radioactive Dating
Radiometric Dating
3. What is the difference between an absolute date and a relative date?
A. An absolute date refers to a year or a range of years while a
relative date indicates a chronological order.
B. A relative date is derived from radiometric dating techniques while
an absolute date comes from guesswork.
C. A relative date refers to a year or a range of years while an absolute
date indicates a chronological order.
D. An absolute date involves testing of sedimentary rocks while relative
date involves testing of igneous rocks.
4. What method of rock dating is used in giving rocks an actual date?
A.
B.
C.
D.
Relative Dating
Absolute Dating
Historical Dating
Geological Dating
5. Which of the following is NOT true about Relative Dating?
A. quantitative method of dating
B. principles to recognize the relative ages of rocks
C. used to arrange geological events and the rocks they leave behind in
sequence
D. used stratigraphy method (oldest found at the bottom and youngest
at the top)
212
Refer to the diagram below and answer the questions that follow.
6. Which layer of the rocks follows the principle of superposition?
A.
B.
C.
D.
Layer
Layer
Layer
Layer
1
3
4
6
7. Which layer of the rocks shows the cross-cutting relationship?
A.
B.
C.
D.
Layer
Layer
Layer
Layer
1
3
4
6
8. Which of the following is NOT principle of Relative Dating?
A.
B.
C.
D.
Superposition
Floral Succession
Original Horizontality
Cross-cutting Relationship
9. Which of the following is NOT true about Absolute Dating?
A. It is a quantitative method of dating.
B. It uses simple principles to recognize the relative ages of rocks.
C. It is used to give rocks an actual date, or date range, in
number of years.
D. It uses radiometric method by radioactive decay: concept of
Isotopes and concepts of half- life.
10. What method of rock dating is using stratigraphy method?
A.
B.
C.
D.
Relative Dating
Absolute Dating
Historical Dating
Geological Dating
213
11. Which of these is the best indication of the relative age of a rock layer?
A.
B.
C.
D.
the thickness of the layer
the chemical make-up of the layer
the distance of the layer on the surface
the position of the layer compared to other layers
12. The absolute age of an igneous rock can best be determined by ___________
A. examining the rock’s relative position in a rock outcrop
B. examining the environment in which the rock is found.
C. comparing the size of crystals in the upper and lower parts of
the rock
D. comparing the amount of decayed and undecayed radioactive
isotopes
13. In an undisturbed rock file, the youngest rock is found______________.
A.
B.
C.
D.
on the topmost
at the bottom
upper part
lower part
14. The principle of horizontality is based on the observation that sediment
usually accumulates in _______________ layers.
A. horizontal
B. straight
C. vertical
D. round
15. Which of the following makes use of the position of rocks to determine its
age?
A. Relative Dating
B. Absolute Dating
C. Historical Dating
D. Geological Dating
Additional Activities
If you will be asked to determine the age of a rock, which method will you use?
Justify you answer.
214
215
What's More
Activity 3.a
Activity 4
1.
2.
3.
4.
5.
1.Qualitative
/Quantitative
2.Stratigraphy
/ Radiometric dating
Activity 5
1. Absolute dating
2. Cross- cutting
3. Relative dating
4. Superposition
5. Sedimentary rocks
What I Know
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
D
C
B
A
A
A
A
A
D
B
B
A
C
B
A
Layer I
Younger
Layer R
Cross cutting relationship
Layer B
Activity 3.b
A. 495 mya
B. 545mya
C. Absolute dating
What's in
Activity 1
Rocks, Relative, Absolute
Fossils, History, Earth, Ages
Sentences may vary.
What's New
Activity 2
1. Horizontal layers
2. Give relative age of
rock/fossils
3. Bottom/Topmost
Reason: Original
Horizontality
4. Yes, No
5. Thick, large deposition
happened
Thin, erosional activity
worn the sediments
Assessment
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
A
A
A
B
A
D
B
B
B
A
D
D
A
A
A
Answer Key
What is It
References
Centricity, accessed February
VA01000195/centricity
24,
2019,
https://www.lcps.org/cms/lib4/
Companion Websites, accessed February 25, 2019,
http://global.oup.com/us/companion.websites/9780195391350/studentc
hapt2/Quiz/
Geological
Dating,
Propofs,
accessed
February
25,2019,
http://www.proprofs.com/quiz-school/story.php?title=geological-dating
Kean, accessed February 25, 2019, http://www.kean.edu/~csmart/Observing
/Lectures/Homework08s.doc
Layers of Rock, accessed February 24,2019, https://halletcove.weebly.com/layersof-rock.html
Quizziz,
accessed
February
25,2019,
/570bb06788512b8d10163a2e
https://quizizz.com/admin/quiz
Relative Dating, All About Creation, accessed February 24,2019,
https://www.allaboutcreation.org/relative-dating-faq.html
Relative vs. Absolute Dating, accessed
February 24,2019,
https://science.truck.com/relative-vs-absolute-dating
Thompson, G.R. and Turk, J. 2012. Introduction to Earth Science. Cengage Learning
Asia PTE Ltd. (Philippine Branch)
216
Earth and Life Science
Geologic Time Scale:
Relative and Absolute Dating
Earth and Life Science
Geologic Time Scale: Relative and Absolute Dating
First Edition, 2020
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However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writer:
Lucila D. Castor
Editors:
Melanie I. Samudio, Jocelyn M. Manset
Reviewer:
Jason Ricaforte, Angelica Beriña, Princess Paolah L. De Guzman, Marissa C. Betchaida,
Louie L. Alvarez, Gregorio M. De Chavez, Jr, Jocelyn M. Manset, Mario B. Maramot,
Elaine T. Balaogan, Job S. Zape Jr.
Illustrator:
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Layout Artist:
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Management Team:
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217
Week
6
What I Need to Know
This module covers the scientific principles that the historical geologists used to
describe the Earth’s past. This will also serve as a guide to the clues that were left
on Earth, the different events, and the time it took these events to happen which
are depicted in the geologic time scale.
In this module, you will be able to determine the different divisions that comprise
the geologic time scale which uses the two methods of record: the absolute and the
relative dating.
The module is composed of the:
Lesson: Geologic Time Scale: Relative and Absolute Dating
After going through this module, you are expected to:
1. Name the divisions of the geologic time scale.
2. Characterize each major and subdivisions in the geologic time scale.
3. Describe how relative and absolute dating provide evidence of geologic
history.
What I Know
Before you use this module, take the Pretest below.
Directions: Read each item carefully. Choose the letter of the best answer and
write the chosen letter on a separate sheet of paper.
1. Which division in the geologic time represents a time span of about 88%?
A. Cenozoic
B. Mesozoic
C. Paleozoic
D. Precambrian
2. Which of the following division in the geologic time scale is considered as the
“Age of the Reptiles”?
A. Cenozoic
B. Mesozoic
A. Paleozoic
B. Precambrian
3. Which of these is the best indication of the relative age of a rock layer?
A. the thickness of the layer
B. the chemical makeup of the layer
C. the distance of the layer extends over the Earth
D. the position of the layer compared to other layers
218
4. In an undisturbed rock profile, where can the oldest be found?
A. in the middle
B. at the bottom
C. on the top
D. anywhere
5.
In which of the given rocks is Radiometric dating least useful ?
A. granitic
B. basaltic
C. sedimentary
D. metamorphic
6. Which method was used in naming the subdivisions of the Earth’s
geology in a specific order?
A. isotopic dating
B. relative dating
C. absolute dating
D. radiometric dating
7. Which division in the geologic time shows evidence of molten rocks in the
Earth’s surface due to its high temperature?
A. Mesozoic Era
B. Precambrian
C. Miocene Epoch
D. Tertiary Period
8. What fraction of the Earth’s history is embraced by the geologic time scale?
A. evolution of life
B. formation of Earth
C. formation of universe
D. formation of the solar system
9. How are the geologic eras largely determined?
A. earth’s orbital position
B. shifts in the fossil record
C. average global temperature
D. distribution of rock sequences
10. In what geological periods did trilobites and other early arthropods appear?
A. Cambrian
B. Devonian
C. Permian
D. Eocene
11. In which geologic era do we currently live?
A. Cenozoic
B. Mesozoic
219
C. Paleozoic
D. Proterozoic
12. From the lists of divisions in the geologic time scale, which is considered as
the earliest?
A. Hadean
B. Archaean
C. Quaternary
D. Phanerozoic
13. Which of the following does NOT represent the geologic time scale?
A. the geologic history of universe
B. the fossil record of flora and fauna
C. the age of the Earth and its inhabitants
D. evolution of life dating back 4.6 billion years ago
14. What do you call the organism that is no longer existing on Earth?
A. extinct
B. petrified
C. fossilized
D. sedimentary
15. Which geological era marks its end with the disappearance of the
dinosaurs?
A. Precambrian
B. Mesozoic Era
C. Miocene Epoch
D. Tertiary Period
Lesson 1
Geologic Time Scale
Deposition of sediments contribute to reshaping the surface of the Earth. Deposits
are laid down by different environmental factors such as volcanic eruption, erosion,
weathering debris of rocks (clay and silts) and even all its fossil content and
historical information.
Earth history including its rock strata, the rock study, and discovery, as well as the
fossils, are engraved in one of the most important materials known as geologic
record. The geologic time scale is the “calendar” for events in Earth’s history.
The importance of Geologic time scale was, it serves as standard timeline used to
describe the age of rocks, fossils, and the events that formed them. A device which
is of great help to the science of geology owed to the explorations and studied made
by the geologists that were recorded.
220
The necessity of knowing how life began in the past, the events, and principles
behind the Earth’s history enable us to conform with the alterations or
consequences that we might encounter or experience in the near future. As a part
of the new generation, we should be appreciative and accept that all things that are
present in our time were the outcome of Earth’s history.
What’s In
In the previous lessons, you had learned that stratified rocks are products of
sedimentary process which include weathering and erosion of pre-existing rocks.
Wherein, these sediments will be transported by the agent of erosion such as water,
wind, or ice, and deposited in seas and acted upon by the process of compaction
and lithification. As time goes by, these sedimentary rocks will form layers or
stratification representing periods of deposition of sediments. Based on this, there
are several laws that governed stratigraphy as proposed by Nicolas Steno.
Nicolas Steno’s Law of Stratigraphy opens our eyes to the world of rock layers and
its formation. It also shows how endogenic and exogenic geological processes cause
alteration in rocks that lead to the formation and deformation of rock layers.
Let us find out if you can still recall how these laws are depicted in the rock strata.
Identify the law of stratigraphy the following diagrams represent.
A
B
A
Guide questions:
1.
2.
What laws of stratigraphy does the picture in letter A tell us?
In picture B, new rocks were introduced. What law is best explained
in this kind of rock stratum?
3. How old is the rock that was intruded in stratum B?
4. What geologic processes existed in stratum B which causes its
deformation?
5. If you want to determine the age of the rocks in the rock layer, what
method are you going to use?
221
What’s New
Sequence Drill
In a sequential manner, make five to seven relative events that happened in your
life. For example, the day you were born, the day your brother or sister was born,
or your first date with your boyfriend or girlfriend. Write your answer in the table
below.
Time Scale
Relative Scale
I was born
Absolute Scale
I was born
Example
(Jan.28,2001)
The way the relative events are arranged in your data is similar to how the geologists
studied the Earth’s history: its geological timescale of Earth’s age and how it is
determined.
What Is It
Since the beginning, geologists have been studying the Earth to unwrap the secrets
of the past. They have been analyzing rock samples gathered from different
continents in the world including its layers and its correlation with the fossils. This
helps in relating the sequence of events in the Earth’s history which is clearly
presented in the geologic time scale.
The geologic time scale is divided into a series of time intervals which are equal in
length. These time intervals are different from that of a clock. They are divided
according to the significant events in the history of Earth such as the mass
extinction of a large population of fauna and flora.
Table 2. Geologic Time Scale
Eons
Era
Period
Quaternary
Cenozoic
222
Epoch
Age (Mya)
Holocene
0.01
Pleistocene
1.8
Pliocene
5.3
Tertiary
Phanerozoic
Miocene
23.0
Oligocene
33.9
Eocene
55.8
Paleocene
65.5
Cretaceous
145
Jurassic
200
Triassic
251
Permian
299
Pennsylvanian
318
Mississippian
359
Devonian
416
Silurian
444
Ordovician
488
Cambrian
542
Proterozoic
bacteria and
blue green
algae
2500
Archean
oldest fossil
3800
Hadean
Beginning of
earth
4600
Mesozoic
Paleozoic
Precambrian
The table represents the divisions of the geologic time in Earth’s history are
separated into eons, periods, and epochs. The Earth’s age which is 4.6 billion years
was separated into different span of time to handily indicate the events.
223
DIVISION IN THE GEOLOGIC TIME SCALE
EONS
are the longest portions in the geologic time.
Precambrian
It accounts for 88%
Earth’s history.
It is subdivided into three
eons: Hadean,
Archean and Proterozoic
Phanerozoic Eon
It means visible life.
It is subdivided into eras:
Paleozoic, Mesozoic and
Cenozoic.
Hadean Eon
Few rocks were deformed
and metamorphosed.
Archaean Eon
Marine rocks contain
fossil
remains
of
microscopic algae and
bacteria
Proterozoic Eon
rifting of the continental
crust
subsequent filling with
sedimentary and volcanic
rocks
Paleozoic Era
It is the beginning of early
life.
All of the continents had
come together to form the
supercontinent called
Pangea.
It is characterized by rapid
development of terrestrial
plants.
Devonian period is known
as the age of fishes.
Mesozoic Era
It is also known as the
Age of Dinosaurs.
Pangea rifted into
Laurasia and
Gondwanaland.
Cenozoic Era
It is also known as the age
of recent life or age of
mammals.
It has the most complete
record of any era because
the
rocks
are
more
accessible.
224
DIVISION OF THE CENOZOIC ERA
Cenozoic Era
There are three periods in this
era: Quaternary, Paleogene
and Neogene.
Paleogene Period
Most Earth’s climate
was tropical.
Continents
drifted
apart
creating
vast
stretches of oceans
It
consists
the
Paleocene, Eocene, and
Oligocene Epoch
Neogene Period
It gives rise to early
primates.
It consists of Miocene
and Pliocene Epochs
Quaternary Period
It is the most recent period.
It is also termed Anthropogene
period.
It is divided into two epochs:
Pleistocene and Holocene.
Holocene - when human
civilization arose.
Relative and Absolute Dating
Scientists first developed the geologic time scale by studying rock layers and index
fossils. The information gathered by the scientists placed the Earth rock strata in
order by relative age. Geologic time is often discussed in two forms: relative time
and the absolute time.
Relative time is a subdivision of the Earth’s geology in a specific order based upon
the relative age relationships (commonly, vertical or stratigraphic position). These
relative time can be established usually on the basis of fossils. On the other hand,
absolute time refers to the numerical ages in millions of years or some other
measurement. These are obtained by radioactive dating methods performed on
appropriate rocks.
Relative time can be referred to as its physical aspects found in rocks while the
absolute time refers to the measurements taken upon those to determine the actual
time it expired. The time scale is depicted in its traditional form with the oldest at
the bottom and the youngest at the top.
225
What’s More
Activity 1.1 It’s a Date
1.
Fill in the data table to show the number of millions of years each era lasted
based on relative and absolute dating. Choose your answer from the given
choices below.
a. 4.048 mya
c. 299 mya
e. 4,600mya
b. 69 mya
d. 184mya
The Divisions of
Geologic Time
The Age of the Earth
A. Cenozoic Era
B. Mesozoic Era
C. Paleozoic Era
D. Precambrian Time
Percent
Millions of years
100%
1.5%
4%
6.5%
88%
Guide Questions:
1. Based on the data table, which is the oldest era? _________________
2. How old is the shortest era? _______________
3. How old is the Cenozoic Era? ______________
4. What dating method is applied in the activity? Why? _____________
5. Where can we apply the relative dating method? ________________
Activity 1.2 You Complete it
Complete the timeline of the geologic time scale starting from the oldest to recent
time. Indicate each division and year.Use the data table in Activity 1.1 as reference.
1
2
3
4
5
6
7
8
9
10
Activity 1.3 Word Pool
Identify the term being described by the given statement.Select your answer from
the word pool below.
Geologic record
Relative dating
Absolute dating
Archaean
Eons
Cenozoic
Holocene
Paleozoic
226
Dinosaurs
Sedimentary
Devonian
_____________1. It is where all traces of history of earth is recorded in rocks that
make up the crust.
_____________ 2. It is a way on how the age of rocks and fossils can be determined
by its numeric value.
_____________ 3. It is the largest division in the geologic time scale.
_____________ 4. It refers to the rocks that are deposited and used in dating method.
_____________ 5. It is used to determine the geological events in rock strata.
_____________ 6. It refers to prominent reptiles that evolved during Mesozoic Era.
_____________ 7. The fitting of supercontinent Pangea happened in this era.
_____________ 8. The present human evolved during this age.
_____________ 9. It refers to the age of the fishes.
_____________ 10. Ancient bacteria and blue green algae existed during this age.
What I Have Learned
Activity 1.4 Vocabulary Building
Make a concept definition map for each of the vocabulary terms listed below. Write
the term in the central box. Fill in the other boxes by answering the questions. The
first term is done for you.
What information does it
give?
What are some of its
characteristics?
gives clues about
Earth’s past
Usually found in
sedimentary rock
Shows only hard
parts of plant or
animal
FOSSIL
Shows changes in life
and the environment
A. Fossil
B. Geologic Time Scale
C. Relative Dating
D. Absolute Dating
227
Things to Ponder
Geologic time scale is a timeline that illustrates Earth’s past.
Geologic time scale describes the order of duration of major events on Earth for
the last 4.6 billion years.
Geologic time scale was developed after the scientist observed changes in the
fossils and rocks going from oldest to youngest sedimentary rocks.
Geologic time scale was divided into four divisions which include the Eons, Era,
Period, and Epoch.
Eons is the largest division in the geologic time scale.
Relative dating or age is the order of the rocks from oldest to youngest.
Relative dating does not determine the exact age of rock or fossils but does learn
which one is older or younger than the other.
Relative age of rocks based on the order gives its physical division in the geologic
time scale.
Absolute dating or age measures the amount of radioactive elements in rocks to
give the ages to each division of time in the geologic time scale.
Absolute time refers to the numerical ages in millions of years or some other
measurement.
What I Can Do
Make a diary noting the important events that happened in your life for the day
which you can associate with the geologic time scale.
DATE
DAYS OF THE
WEEK
EVENT/ACTIVITY
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
228
Assessment
Directions: Read each statement and choose the letter of the correct answer. Shade
the circle that corresponds to the correct answer.
1. What information does the geologic time record provide?
A. the rate of fossil formation
B. the thickness of sedimentary rock layers
C. the time since the evolution of dinosaurs
D. the life forms and geologic events in Earth’s history
2. How do geologists separate time into period?
A. by the time the fossil is discovered
B. by looking at the relative time of a fossil
C. by special events that have happened in that period
D. by counting the years that a fossil has been preserved
3.
What do you call the method of placing geologic events in sequential order
as determined by their position in the rock record?
A. correlation
B. uniformitarianism
C. relative dating
D. absolute dating
4. How important is absolute time?
A. It is useful if fossils are present.
B. It gives a specific date in an object.
C. It gives a non-specific date in an object.
D. It only gives the sequence in which events have taken place.
5. Which of the following is the primal in absolute dating method?
A. fossils
B. radioactive decay
C. educated estimates
D. cross-cutting relationships
6. Which method is primarily used to establish the geologic time scale?
A. calculation of beta decay of isotopes
B. correlation of rock types across vast
C. calculation of alpha decay of isotope
D. distances correlation of magnetic signatures in rocks
7. Which of the following era is sometimes called “the age of fish” or “ancient
life”?
A. Cenozoic
B. Mesozoic
229
C. Paleozoic
D. Precambrian
8. What will be the sequence of division in the geologic time scale, if the order
of position is from shortest to longest?
A. era, period, epoch
B. epoch, period, era
C. period, epoch, era
D. epoch, era, period
9. Scientists use a criterion to decide where to place the boundaries between
the major divisions of the geologic time scale. They consider major changes.
Where can these major changes be found?
A. written in the fossil record
B. occurring in the solar system
C. in structure of the Earth’s layer
D. in the arrangement of the continent
10. In which division in the geologic time scale did the continents come together
to form the supercontinent called Pangaea?
A. Paleozoic Era
B. Cenozoic Era
C. Triassic Period
D. Jurassic Period
11. In what ways do eras differ from periods?
A. They are longer spans of time.
B. They are subdivided into epochs.
C. They have longer durations than eons.
D. They have boundaries marked by mass extinctions.
12. Which epoch in the geologic time scale represents human lives in a very
short period of time?
A. Eocene
B. Pliocene
C. Holocene
D. Pleistocene
13. Why are fossils recorded in the geologic time scale said to be incomplete?
A. Remains of past organism decayed faster.
B. Absence of tools to be used for tracing.
C. Most organisms never became fossils.
D. All of the above
14. In what way does the geologic time scale place Earth’s rock in order?
A. by composition
B. by relative dating
230
C. by absolute dating
D. by decades and centuries
15, What makes fossil essential to the scientists and to the history of the Earth?
A. It analyzes the composition of sedimentary rock
B. It predicts what organisms will become extinct.
C. It describes the history of past life and environment.
D. It presents temperature of the oceans in different depths.
Additional Activities
Create your own representation of geologic time scale on rocks indicating the
relative and absolute dating. Use discarded material in your output.
231
232
What's More
Activity 1.3
1.
2.
3.
4.
5.
Geologic records
Absolute dating
Eons
Sedimentary
Relative dating
6. Dinosaurs
7. Paleozoic
8. Holocene
9. Devonian
10. Archaean
What's More
Activity 1.4
1.Geologic Time Scale
-timeline that illustrates
Earth’s past
Characteristics
-divided into
eons,era,period,epoch
- uses the relative and
absolute dating
2. Relate dating
-gives relative age of rocks
Characterisctics;
Uses the position of rocks
-follows the law of
stratigraphy
3. Absolute Dating
-gives the numeric age of
rocks
What's More
Activity 2
1. Precambrian
2. Paleozoic
3. Mesozoic
4. Cenozoic
5. Recent time
6. 4.048mya
7. 299mya
8. 184mya
9. 69mya
10. 4600mya
Assessment
1.
2.
3.
4.
5.
6.
7.
8.
9.
D
B
C
B
B
B
C
B
A
11.B
12.C
13. D
14.B
15.C
10.A
Answer Key
What's More
Activity1.1 Its a Date
1.E
2.A
3.B
4.D
5. C
Answer:
1.D
2.A
3.B
4.Absolute dating
5.Precambrian is the oldest
era because it is located at
the bottom.
References
All About Creation. “Relative Dating.” Accessed February 24,2019.
https://www.allaboutcreation.org/relative-dating-faq.html
“Centricity.” Accessed February 24,2019.
https://www.lcps.org/cms/lib4/VA01000195/centricity
Earth Science Week. “Geological Timescale.” Accessed February 24,2019.
https:www.earthsciweek.org/content/geologial-time-scale
Kean. Accessed February 25,2019.
http://www.kean.edu/csmart/observing/lecture/homework
“Layers of Rock.” Accessed February
24,2019,https://halletcove.weebly.com/layers-of-rock.html
“Observing Lectures,” Accessed February 25,2019.
https://www.kean.edu/~csmart/Observing/Lectures/ Homework08s.doc
Oxford University Press.“The Past in Perspective.” Accessed February 25, 2019.
http://global.oup.com/us/companion.websites/9780195391350/student/
chapt2/Quiz/
ProProfsQuizzes.“A Trivia Quiz on Geological Dating.” Accessed February 25,
2019. www.proprofs.com/quiz-school/story.php?title=geological-dating
Quizziz. “Relative and Absolute Dating.” Accessed February 25,2019.
https://quizizz.com/admin/quiz/570bb06788512b8d10163a2e
“Relative Vs. Absolute Dating,” accessed February 24,2019,
https://science.truck.com/relative-vs-absolute-dating
233
Earth and Life Science
Geologic Timeline
Earth and Life Science
Geologic Timeline
First Edition, 2020
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Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
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Writers:
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Editors:
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Reviewer:
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Illustrator:
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234
Week
6
What I Need to Know
This module was designed and written with you in mind. It is here to help you
master the nature of Biology. The scope of this module permits it to be used in many
different learning situations. The language used recognizes the diverse vocabulary
level of students. The lessons are arranged to follow the standard sequence of the
course. But the order in which you read them can be changed to correspond with
the textbook you are now using.
The module covers:
Lesson 1 – Geologic Timeline
After going through this module, you are expected to:
1. Describe how the Earth’s history can be interpreted from the geologic time
scale.
2. Define fossils and its type.
3. Determine the guide fossils that are used to define and identify subdivision
of the geologic time scale.
4. Track the Earth’s history using the geologic time scale.
5. Identify the different divisions in the geologic time scale.
What I Know
Choose the letter of the best answer. Write the chosen letter on a separate
sheet of paper.
1. Which of the following does NOT belong to Paleozoic Era?
A. Jurassic
B. Devonian
C. Cambrian
D. Ordovician
2. What do you call the remains or evidence used as markers when building up
the geologic time scale?
A. fossil
B. minerals
C. sandstone
D. piles of rock
235
3. Why do most of the eons and eras end in “zoic”?
A. because these time periods were recognized by the plants present at
that time
B. because these time periods were recognized by the animal life present
at that time
C. A and B
D. none of the above
4. In what type of rocks are fossils made of?
A. igneous rock
B. sedimentary rock
C. metamorphic rock
D. all of the above
5. What do you call the person who studies fossils and ancient life?
A. biologist
B. archeologist
C. anthropologist
D. paleontologist
6. What do you call the process by which the remains of ancient living things
are turned into rock?
A. fertilization
B. fossilization
C. fragmentation
D. metamorphosis
7. How were the scientists able to arrange the
A. They were able to arrange the fossils
B. They were able to arrange the fossils
C. They were able to arrange the fossils
D. They were able to arrange the fossils
fossils they gathered?
according to age.
according to structure.
according to chemical content.
according to place of discovery.
8. In this era, the rocks formed have fossils of animals and plants such as
dinosaurs, mammals and trees.
A. Cenozoic Era
B. Mesozoic Era
C. Paleozoic Era
D. Phanerozoic Era
9. In what era did the first skeletal elements, soft-bodies metazoans, and animal
traces exist?
A. Cenozoic Era
B. Mesozoic Era
C. Paleozoic Era
D. Late Proterozoic
236
10. In this period, the first mammals and dinosaurs existed.
A. Cretaceous
B. Permian
C. Jurassic
D. Triassic
11. In Paleozoic Era, in what period did the first vascular land planet exist?
A. Cambrian
B. Devonian
C. Silurian
D. Ordovician
12. These marine animals lived inside their shells, taking up the whole inside of
the long shell.
A. echinoderms
B. gastropods
C. mollusks
D. Sea arthropods
13. In what phylum do crinoids belong?
A. echinoderms
B. arthropods
C. gastropods
D. mollusks
14. These were marine arthropods and were made of chitin, like some insects
and other organisms like lobsters.
A. crinoids
B. trilobites
C. fossil clam
D. gastropods
15. These marine animals are bivalves with two symmetrical shells – the shells
are mirror images of each other.
A. crinoids
B. trilobites
C. fossil clam
D. gastropods
237
Lesson 1 Geologic Timeline
Fossils are the remains or evidence of prehistoric plants and animals that have
fossilized. Fossils were used as markers when building up the geologic time scale.
The names of most of the eons and eras end in “zoic”, because these time periods
were recognized by the animal life present at the time. Rocks formed during the
Proterozoic Eon have fossil evidence of simple organisms, such as bacteria, algae,
and wormlike animals. In the Phanerozoic Eon, the rocks formed have fossils of
animals and plants such as dinosaurs, mammals, and trees.
And with that, geologists have developed the geological time scale, which divides the
Earth’s history into eons that are subdivided into eras, which are further divided
into periods and then into epochs. The geologic time scale is the “calendar” for
events in Earth’s history. It subdivides all time since the end of the Earth’s formative
period as a planet (nearly 4 billion years ago) into named units of abstract time: in
descending order of duration, which are eons, eras, periods and epochs.
The geologic time scale provides a system of chronologic measurement relating
stratigraphy to time that is used by geologists, paleontologists and other Earth
scientists to describe the timing and relationships between events that have
occurred during the history of the Earth. The detailed studies made of rocks
throughout the world have allowed geologists to correlate rock units globally, and
break them into time units. The result is the Geologic Time Scale, usually presented
in a chart like form with the oldest event and time unit at the bottom and the
youngest at the top.
What’s In
Activity 1
Review the vocabulary words and complete the activity on the other side of this
worksheet.
1. Fossils – remains of ancient life that have been turned to stone
2. Body Fossils – actual parts of plants and animals that have been turned to
stone (i.e. bone, shells, leaves)
3. Coprolite – fossilized dinosaur dung (scat)
4. Fossilization – process by which the remains of ancient living things are
turned to rock
5. Paleontologist – a scientist who studies fossils and ancient life
6. Sedimentary Rock – rock made of layers of tightly packed sand and clay
7. Sandstone – a type of sedimentary rock that is made of sand
8. Trace Fossil – a fossilized sign that a plant or animal once lived in an area
(i.e. footprints, coprolite)
238
9. Porous – full of tiny holes that water, air, and light can pass through
10. Mineralization – to convert into a mineral substance; to fill with a mineral
substance
Instructions: Fill in the blanks, using vocabulary words.
Jay, a famous p ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ t , was hiking in the
Cordillera mountains searching for f ___ ___ ___ ___ ___ ___, which are remains of
ancient life that have turned to stone. All of a sudden, the ground shook beneath
him. Jay ran over a hill and saw that there had been a huge landslide. He went over
to look at the piles of rocks and saw layers of s ___ ___ ___ s ___ ___ ___ ___, a type
of sedimentary rock. Fossils are found in sandstone, so Jay was excited to search
through the rocks! Just as he began to dig, he found fossilized bones. The bones
had turned to stone through a process called ___ ___ s s ___ ___ ___ ___ ___ ___ ___
___ ___. Jay saw that the fossils belonged to an Apatosaurus. These bones are
examples of b ___ ___ ___ ___ ___ ___ ___ i l ___, which are fossilized parts of plants
and animals. Jay hiked further up the mountain and found fossilized dinosaur
dung, called c ___ ___ ___ ___ ___ ___ ___ ___. He also found a huge footprint, which
is an example of a t ___ ___ ___ ___ f ___ ___ ___ ___ ___. Jay carefully removed the
fossils from the rocks and donated them to a museum.
239
Activity 2: Find Me
Directions. Encircle the 8 words listed below. Words may appear straight across,
back-word straight across, up, and down.
COPROLITE
PALEONTOLOGIST
FOSSILS
MINERALIZATION
SEDIMENTARY
SANDSTONE
FOSSILIZATION
POROUS
L
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O
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A
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240
Activity 3: Let’s Trace
Look and analyze at the illustration below and answer the question listed below.
1. For how long has there been life on Earth?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
241
2. For what percentage of time has life existed on Earth (round to the
nearest whole number)?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
3. For about how many years of geological time have humans existed on
Earth?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
4. For about how many years of geological time have the dinosaurs existed
on Earth?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
5. Did dinosaurs exist at the same time as humans?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
6. How do scientists determine when an era begins and when it ends?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
7. What is the purpose of making a geological timeline?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
242
What’s New
The Story of Fossils
by Patti Hutchison
Imagine you are hiking in the woods. As you walk up a steep hill, you find a fossil.
It is a mold of many tiny seashells. What would seashells be doing in the middle of
the woods?
Most fossils are found in sedimentary rocks. These rocks form on the surface of the
earth. They record the processes that have happened on the surface, including life.
Scientists are able to arrange fossils according to age. This is called the fossil record.
By studying the fossil record, scientists have found that the earth and its life forms
have gone through many changes in the past.
Fossils have taught us how and when rock layers have formed. They have also
helped scientists learn about life forms that have come and gone. Fossils have even
taught us about the climate of the earth long ago.
The Geologic Time Scale is divided into huge blocks of time called eras. Eras are
defined by major changes in the fossils found in the sedimentary rock layers that
were formed during those time spans.
Activity 4
Directions: Read the story entitled “The Story of Fossil” by Patti Hutchison. Answer
the guide questions stated below.
1. In what type of rocks are FOSSILS made of?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
2. How do scientists arrange discovered fossils?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
3. How did fossils help and teach scientist about the history of the earth?
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
4. Aside from geological aspect, what other aspects can be predicted by guide
fossils? How? (climatic, organismic etc.)
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
243
What is It
Activity 5
Read and analyze the statements below. Write T if the statement is TRUE and F if
the statement is FALSE.
_______ 1. Scientists determine when an era begins and when it ends through
geological timeline.
_______ 2. Dinosaurs exist at the same time as humans.
_______ 3. The purpose of making a geological timeline is to identify age of
organism through its fossils.
_______ 4. Quaternary period of geological time has humans evolved on Earth.
_______ 5. Triassic Period of geological time have the dinosaurs existed on
Earth.
What’s More
Activity 6
Directions: Write the division and period of the listed organism below. Refer to
geological time scale.
Era
Period
1. first vascular land plants
____________ ____________
2. jawed fish diversity
____________ ____________
3. evolution of humans
____________ ____________
4. first chordates
____________ ____________
5. mammals diversify
____________ ____________
6. first primates
____________ ____________
7. dinosaurs’ diversity
____________ ____________
8. major extinctions of reptiles’ diversity
____________ ____________
9. sudden diversification of metazoan families
____________ ____________
10. first flowering plants
____________ ____________
244
Activity 7: Crossword Puzzle
Directions. Complete the crossword by filling in the word that describes each clue.
6
4
5
1
8
2
7
3
Across:
2. with two symmetrical shells - mirror images of each other.
3. the term “crinoid” means
5. rocktype made of layers of sand and clay
7. multicellular organisms that often live in colonies
Down:
1. exoskeletons are made up of this material
4. lived inside their shells
6. phylum where starfish and sea urchins belong
8. individuality of coral is called _____.
245
What I Have Learned
Fill in the blanks. Read and analyze the statements below. Write the word that will
complete the sentence/paragraph.
1. __________________ are the remains or evidence of prehistoric plants and
animals that have fossilized.
2.
Fossils were used as markers when building up the geologic time scale. The
names of most of the eons and eras end in “zoic” because these time periods
were recognized by the __________________ present at the time.
3.
The geologic time scale is the “calendar” for events in Earth’s history. It
subdivides all time since the end of the Earth’s formative period as a planet
(nearly 4 billion years ago) into named units of abstract time: in descending
order of duration, which are _________, __________, _________ and
___________.
4.
The __________________ provides a system of chronologic measurement
relating stratigraphy to time that is used by geologists, paleontologists and
other Earth scientists to describe the timing and relationships between
events that have occurred during the history of the Earth.
5.
The Geologic Time Scale is divided into huge blocks of time called eras.
Eras are defined by major changes in the fossils found in the
__________________ rock layers that were formed during those time spans.
246
What I Can Do
Activity 7
There are tables of fossils presented below. In the first box, choose an example and
draw its physical structure. Second box and third box are references that serve as
your guide to choose what organism you prefer to draw. Check the example. Good
luck!
Example:
Braching Tabulate Coral
Age:
Devonian
(approximately 416 to
359 million years ago)
Class: Anthozoa
Moden Relatives: Corals
still exists today.
1.
TRILOBITE
Age:
Devonian
(approximately 416 to 359
million year ago)
Phylum: Arthropod
Modern Relatives: Crabs,
Spiders and insects
247
Branching
Tabulate
Coral is a marine animal.
Corals are multicellular
organisms that often live
in
colonies.
The
individual
animal
is
called a polyp. There are
many different species of
coral,
with
different
forms, shapes, and sizes.
Trilobites were marine
arthropods.
The
first
trilobites show up in the
fossil record dating back
to about 525 million years
ago. There were many
different
types
of
trilobites, ranging in size
from 1mm to 72mm (28
inches long!) Trilobite
species went extinct by
250 million years ago.
Trilobite fossils are formed
from the exoskeletons.
These were made of chitin,
like some insects and
others organisms like
lobsters. They split apart
and shed their shell as
they grow, just like
lobsters do.
2.
Crinoid
Age:
Devonian
(approximately 416 to
359 million years ago)
Phylum: Echinoderm
Modern
Relatives:
Starfish, sea urchins
and sea cucumbers
Crinoids
were
marine
animals. Its name means
“Lily”. It is in the same
phylum (Echinoderm) as
starfish and sea urchins.
Crinoids ate by filtering food
out of the water with it arms.
Its mouth and anus were
next to each other in the
calyx. It “rooted” in place
with a holdfast. When
crinoids die, their stems
quickly break apart. The
most common fossils of
crinoids are the stem which
is sometimes broken into
little “cheerio” like pieces.
3.
Gastropod
Age: Cretaceous
(Approximately 146 to
65 million years ago)
Phylum: Mollusk
Modern
Relatives:
Snails,
Slugs
and
Whelks
Gastropods were marine
animals. There were many
different
species
of
gastropods. All had coiled
shells, but some were tightly
coiled while some were
loosely coiled. They had
many different shapes and
surface texture. The animals
lived inside their shells,
taking up the whole inside of
the long shell. They could
retract into their shells,
covering the opening with
their foot.
4.
Fossil Clam
Age:
Cretaceous
(approximately 146 to
65 million years ago)
Class: Bivalve
Modern
Relatives:
Oysters, Scallops and
Mussels
Fossil clams are marine
animals. Clams are bivalves,
with two symmetrical shells the shells are mirror images
of each other. Fossil clams
range in size from a few
millimeters to up to 2 meters
(about 6 feet) in diameter.
Clams lived inside their shells
and had a muscular foot they
used to borrow and move
around. They lived in colonies
on the ocean floor. Some
clams had smooth shells
while some were rough.
248
Assessment
Multiple Choice. Choose the letter of the best answer. Write the chosen letter on a
separate sheet of paper.
1. These marine animals are bivalves with two symmetrical shells – the shells
are mirror images of each other.
A. crinoids
B. trilobites
C. fossil clam
D. gastropods
2. How were the scientists able to arrange the
A. They were able to arrange the fossils
B. They were able to arrange the fossils
C. They were able to arrange the fossils
D. They were able to arrange the fossils
fossils they gathered?
according to age.
according to structure.
according to chemical content.
according to place of discovery.
3. These were marine arthropods and were made of chitin, like some insects
and other organisms like lobsters.
A. crinoids
B. trilobites
C. fossil clam
D. gastropods
4. What do you call the process by which the remains of ancient living things
are turned into rock?
A. fertilization
B. fossilization
C. fragmentation
D. metamorphosis
5. In what phylum do crinoids belong?
A. echinoderms
B. arthropods
C. gastropods
D. mollusks
6. What do you call the person who studies fossils and ancient life?
A. biologist
B. archeologist
C. anthropologist
D. paleontologist
249
7. These marine animals lived inside their shells, taking up the whole inside of
the long shell.
A. sea arthropods
B. echinoderms
C. gastropods
D. mollusks
8. In what type of rocks are fossils made of?
A. igneous rock
B. metamorphic rock
C. sedimentary rock
D. all of the above
9. In Paleozoic Era, in what period did the first vascular land planet exist?
A. Silurian
B. Cambrian
C. Devonian
D. Ordovician
10. Why do most of the eons and eras end in “zoic”?
A. because these time periods were recognized by the plants present at
that time
B. because these time periods were recognized by the animal life present
at that time
C. A and B
D. none of the above
11. In this period, the first mammals and dinosaurs existed.
A. Cretaceous
B. Permian
C. Jurassic
D. Triassic
12. What do you call the remains or evidence used as markers when building up
the geologic time scale?
A. fossil
B. minerals
C. sandstone
D. piles of rock
13. In what era did the first skeletal elements, soft-bodies metazoans and animal
traces exist?
A. Cenozoic Era
B. Mesozoic Era
C. Paleozoic Era
D. Late Proterozoic
250
14. Which of the following does NOT belong to Paleozoic Era?
A. Cambrian
B. Devonian
C. Silurian
D. Jurassic
15. In this era, the rocks formed have fossils of animals and plants such as
dinosaurs, mammals and trees.
A. Cenozoic Era
B. Mesozoic Era
C. Paleozoic Era
D. Phanerozoic Era
Additional Activities
Do you think that the average annual global temperature and carbon dioxide levels
have been consistent throughout the history of earth? Justify your answer.
251
252
What's It
What's More
What's New
Activity 5
Activity 6
Activity 3
Answer may vary
according to student’s
perception
1.
2.
3.
4.
5.
T
F
T
T
F
Answer may vary
according to student’s
perception
Activity 4
1. Paleozoic -Silurian
2. Paleozoic - Devonian
3. Cenozoic - Quaternary
4. Paleozoic - Cambrian
5. Cenozoic - Tertiary
6. Mesozoic – Cretaceous
7. Mesozoic - Jurassic
8. Paleozoic – Permian
9. Paleozoic – Ordovician
10. Mesozoic - Cretaceous
1. A
2. A
3. B
4. B
5. D
6. B
7. A
8. D
9. D
10.D
11.C
12.B
13.A
14.B
15.C
What's in
Activity 1
Paleontologist
Fossils
Sandstone
Fossilization
Body fossils
Coprolite
Trace fossil
Activity 2
6. Answer may vary
according to
student’s
perception
Assessment
1. C
2. A
3. B
4. B
5. A
6. D
7. C
8. C
9. A
10.B
11.D
12.A
13.D
14.D
15.D
Answer Key
What I Know
References
Chambers, John E. (July 2004). "Planetary accretion in the inner Solar
System" (PDF). Earth and Planetary Science Letters. 223 (3–4): 241–
252. Bibcode:2004E&PSL.223..241C. doi:10.1016/j.epsl.2004.04.031.
Deconto, Robert M.; Pollard, David (2003). "Rapid Cenozoic glaciation of Antarctica
induced by declining atmospheric CO2". Nature. 421 (6920): 245
249. Bibcode:2003Natur.421..245D. doi:10.1038/nature01290. PMID 1252
9638.
Ogg, J.G.; Ogg, G.; Gradstein, F.M. (2016). A Concise Geologic Time Scale: 2016.
Elsevier. p. 20. ISBN 978-0-444-63771-0.
Ogg (eds.). The geologic time scale 2012 (1st ed.). Amsterdam: Elsevier.
pp. 359–
365. doi:10.1016/B978-0-444-59425-9.00016-0. ISBN 978-0-44-459425-9.
Claire; Macchiarelli, Roberto; et al. (2014). "The 2.1 Ga Old Francevillian Biota:
Biogenicity, Taphonomy and Biodiversity". PLoS ONE. 9 (6):
e99438. Bibcode:2014PLoSO...999438E. doi:10.1371/journal.pone.009943
8.PMC 4070892. PMID 24963687
Van Kranendonk, Martin J. (2012). "16: A Chronostratigraphic Division of the
Precambrian: Possibilities and Challenges". In Felix M. Gradstein; James G.
Ogg; Mark D. Schmitz; abi M.
253
Earth and Life Science
Geologic Processes and
Hazards
Earth and Life Science
Geologic Processes and Hazards
First Edition, 2020
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However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Ma. Rhoda E. Panganiban
Editors:
Melanie I. Samudio, Jocelyn M. Manset
Reviewer:
Jason Ricaforte, Angelica Beriña, Princess Paolah L. De Guzman, Marissa C. Betchaida,
Louie L. Alvarez, Gregorio M. De Chavez, Jr, Jocelyn M. Manset, Mario B. Maramot,
Elaine T. Balaogan, Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
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Rosalinda A. Mendoza
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Office Address:
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254
Week
6
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the geologic processes and hazards. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
In this module, we will describe the geologic processes and hazards happening in the
community. Geologic processes like earthquake, volcanic eruption, and landslides
lead to different hazards. A hazard refers to a potentially damaging physical event,
phenomenon or human activity that may cause the loss of life or injury, property
damage, social and economic disruption or environmental degradation. Hazards are
extreme natural events with a certain degree of probability of having adverse
consequences.
The module covers:
Lesson 1 – Geologic Processes and Hazards
After going through this module, you are expected to:
Describe the various hazards that may happen in the event of earthquakes,
volcanic eruptions, and landslides.
What I Know
Directions: Read each statement and choose the letter of the correct answer. Write
the chosen letter on a separate sheet of paper.
1. What is a potentially damaging physical event, phenomenon or human
activity that may cause the loss of life or injury, property damage,
social and economic disruption or environmental degradation?
A. eutrophication
C. landslide
B. geologic hazard D. poisonous gases
2. Which of the following describes the vibration of the ground during an
earthquake?
A. ground shaking C. liquefaction
B. landslides
D. tsunami
3. What do you call the hazard where giant waves move at speeds of up
To 500 miles an hour and reach heights of hundreds of feet?
A. ground shaking C. liquefaction
B. landslides
D. tsunami
255
4. What is the process during earthquake shaking where sand and silt
grains in wet soil are rearranged and the water in the spaces between
the grains is squeezed?
A. ground shaking
C. liquefaction
B. landslides
D. tsunami
5. What refers to the sliding down of a mass of earth or rock from a
mountain or cliff?
A. ground shaking
C. liquefaction
B. landslides
D. tsunami
6. What natural hazard is involved when rock underground suddenly
breaks along a fault causing tectonic movement?
A. volcanic eruption
C. cyclone
B. earthquake
D. hurricane
7. What natural hazard has the effects of reshaping new land, debris
avalanche, destroyed forests, and death to many animals?
A. volcanic eruption
C. earthquake
B. hurricane
D. tsunami
8. What occurs when large amount of water quickly overflows a
boundary?
A. regular flood
C. landslide
B. flash flood
D. tsunami
9. What causes an earthquake?
A. glacier
C. very large storm
B. landslide
D. a movement along fault
10. Which of the following is NOT a natural hazard?
A. hurricane
C. house fire
B. tsunami
D. earthquake
11. A natural physical process becomes a natural hazard when the
process becomes ____.
A. dormant and inactive
B. scary
C. extreme and unpredictable
D. faster than usual
12. Which statement is true of earthquakes?
A. All of them can be prevented.
B. Weak ones can be prevented.
C. Some of them can be prevented.
D. None of them can be prevented.
13. What specific region of the world is characterized by the presence of
active volcanoes, tsunamis, and earthquakes?
A. the ring of fire
C. the North and South pole
B. the Eastern Europe
D. Western Europe
256
14. Which of the following is true of a landslide?
A. A landslide is a mass movement of rock fragments, soil, and
debris downslope.
B. A landslide is associated with a volcanic eruption.
C. If debris from a landslide mixes with water, it will break apart
and stop flowing.
D. All of the answers are true.
15. Which of the following is/are geologic hazard/s?
A. earthquake
B. volcanoes
C. waves pounding on a coast
D. all of these are geologic hazards
Lesson 1
Geologic Processes and Hazards
What’s In
Geology is the study of the Earth and its history. It involves studying the
materials that make up the earth, the features and structures found on Earth,
as well as the processes that act upon them. It also deals with the study of
the history of all life living on the earth now.
How do geological processes occur?
Geological processes are naturally occurring events that directly or indirectly
impact the geology of the Earth. Examples of geological processes include
events such as plate tectonics, weathering, earthquakes, volcanic eruptions,
mountain formation, deposition, erosion, droughts, flooding, and landslides.
Geological processes affect every human on the Earth all of the time, but are
most noticeable when they cause loss of life or property. These threatening
processes are called natural disasters.
How about Geologic Hazards?
A geologic hazard is an extreme natural event in the crust of the earth that
poses a threat to life and property, for example, earthquakes, volcanic
eruptions, tsunamis (tidal waves) and landslides. It is a large-scale, complex
natural events that happen on land. These hazards can cause immense
damage, loss of property, and sometimes life. Geologic hazards can play a
significant role when infrastructure is constructed in their presence. The
unpredictable nature of natural geologic hazards makes identifying,
evaluating, and mitigating against them a unique challenge.
257
Activity 1: Arrange Me
What do you see in the pictures below?
What do you call these hazards?
Following each picture are rumbled letters for you to rearrange. You may
arrange them now by writing the letter in the box provided.
K
I
G
N
N
R
U
O
D
H
A
S
Image 1 shows the vibration of the ground.
A
M
T
S
N
U
I
Image 2 presents giant waves caused by volcanic eruption.
258
G
Q
L
E
F
A
T
I
O
C
N
I
Image 3 happened when soil liquefies during ground shaking.
N
A
S
L
D
E
S
I
D
L
Image 4 showed the movement of a mass of rock, debris, or earth
down a slope.
259
Activity 2: Draw Me
Draw an erupting volcano on the box below.
Based from your drawing, can you name five (5) geologic hazards posed by
an erupting volcano? Write your answer in the table below.
Hazards Posed by an Erupting Volcano
1.
2.
3.
4.
5.
260
What is It
Geologic processes and hazards are events which occur irregularly in time and
space and cause negative impact on man and the environment. Earthquakes,
volcanic eruptions, tsunamis (tidal waves), and landslides are the geologic hazards.
SIMPLIFIED CLASSIFICATION OF MAJOR GEOLOGIC HAZARDS
Geologic Event
Earthquake
Hazards They Cause
A. Ground shaking
B. Surface faulting
C. Landslides and liquefaction
1. Rock avalanches
2. Rapid soil flows
3. Rock falls
D. Tsunamis
Volcanic Eruption A. Tephra falls and ballistic projectiles
B. Pyroclastic phenomena
C. Lahars (mud flows) and floods
D. Lava flows and domes
E. Poisonous gases
Earthquake is one of the most violent natural phenomena. According to the number
of victims and destructive force, it exceeds all other natural disasters. Earthquakes
also happen under the ocean and can cause tsunamis.
Earthquakes and volcanic eruption can trigger landslides, especially in areas with
water saturated soils, a common characteristic of Cascadia. Landslides may result
in falling rocks and debris that collide with people, buildings, and vehicles.
There were earthquakes that happened in the Philippines which were noticeably
strong such as magnitude 6.9 in October 2019 which hit southern Philippines.
Another one was 6.1 magnitude that struck the Island of Luzon in April of 2019.
Recently, multiple earthquakes were felt when Taal Volcano erupted early in 2020.
Have you experienced an earthquake? What did you feel?
261
Probably, you will feel shaking of your body and even the entire surroundings which
causes the ground shaking.
Listed below are the hazards caused by an earthquake:
A. Ground shaking is one of the hazards resulting from earthquake, volcanic
eruption, and landslides. Ground shaking is both a hazard created by
earthquakes and the trigger for other hazards such as liquefaction and
landslides. Ground shaking describes the vibration of the ground during an
earthquake.
B. Surface faulting is displacement that reaches the earth's surface during slip
along a fault. It commonly occurs with shallow earthquakes; those with an
epicenter less than 20 km. Surface faulting also may accompany aseismic
creep or natural or man-induced subsidence.
C. A landslide is defined as the movement of a mass of rock, debris, or earth
down a slope. Landslides are a type of "mass wasting," which denotes any
down-slope movement of soil and rock under the direct influence of gravity.
The term "landslide" encompasses five modes of slope movement: falls,
topples, slides, spreads, and flows.
D. Liquefaction describes the way in which soil liquefies during ground shaking.
Liquefaction can undermine the foundations and supports of buildings,
bridges, pipelines, and roads, causing them to sink into the ground, collapse,
or dissolve.
E. Tsunamis are giant waves caused by earthquakes or volcanic eruptions under
the sea. It can injure or kill many people and cause significant damage to
buildings and other structures. The speed of tsunami waves depends on ocean
depth rather than the distance from the source of the wave. Tsunami waves
may travel as fast as jet planes over deep waters, only slowing down when
reaching shallow waters.
What are volcanoes?
Volcanoes can be exciting and fascinating, but are also very dangerous. Any kind of
volcano can create harmful or deadly phenomena, whether during an eruption or a
period of dormancy. Volcanoes are natural systems and always have some element
of unpredictability.
What about volcanic eruption?
A volcanic eruption occurs when magma is released from a volcano. Volcanic
eruptions are major natural hazards on Earth. Volcanic eruptions can have a
devastating effect on people and the environment.
These are the hazards caused by volcanic eruption:
262
A. Tephra consists of pyroclastic fragments of any size and origin. It is a synonym
for "pyroclastic material." Tephra ranges in size from ash (<2 mm) to lapilli (264 mm) to blocks and bombs (>64 mm).
B. A pyroclastic flow is a dense, fast-moving flow of solidified lava pieces, volcanic
ash, and hot gases. Pyroclastic flows form in various ways. A common cause
is when the column of lava, ash, and gases expelled from a volcano during an
eruption loses its upward momentum and falls back to the ground. Another
cause is when volcanic material expelled during an eruption immediately
begins moving down the sides of the volcano. Pyroclastic flows can also form
when a lava dome or lava flow becomes too steep and collapses.
C. Lahar is an Indonesian term that describes a hot or cold mixture of water and
rock fragments that flows down the slopes of a volcano and typically enters a
river valley. Lahars are extremely dangerous especially to those living in valley
areas near a volcano. Lahars can bury and destroy manmade structures
including roads and bridges.
D. A flood is an overflow of water that submerges land that is usually dry. Floods
can look very different because flooding covers anything from a few inches of
water to several feet.
E. Lava domes are formed by viscous magma being erupted effusively onto the
surface and then piling up around the vent. Like lava flows, they typically do
not have enough gas or pressure to erupt explosively, although they may
sometimes be preceded or followed by explosive activity. The shape and size of
lava domes varies greatly, but they are typically steep-sided and thick.
F. Poisonous gases, the gases that are released during a volcanic eruption, come
from deep within the Earth. The largest portion of gases released into the
atmosphere is water vapor.
The Philippines has suffered from an inexhaustible number of deadly typhoons,
earthquakes, volcanic eruptions and other natural disasters. This is due to its
location along the Ring of Fire, or typhoon belt – a large Pacific Ocean region where
many of Earth’s volcanic eruptions and earthquakes occur.
Taal Volcano, on the island of Luzon in the Philippines, is the country's second most
active volcano. It boomed to life on January 12,2020, Sunday afternoon, spilling
volcanic ash. Taal Volcano sent a massive plume of ash and steam spewing miles
into the sky and pushed red-hot lava out of its crater, prompting the evacuation of
thousands of people and the closure of Manila's airport. Hundreds of earthquakes
were noted while the volcano was erupting. Flashes of lightning lit up the plume,
lending the scene an otherworldly appearance.
263
Activity 3. Check Me Out
1. In the table below, put a check on the hazards that you have experienced in
your locality. Then, explain why these hazards happened to our country.
Ground shaking
Liquefaction
Landslides
Tsunami
2. Why is the Philippines prone to geologic hazard? Write your answer on the
space below.
Activity 4: List Me In
Identify and list down the hazards using published resources and personal
observation. Write your answer in the table below.
Published Resources
Personal Observation
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
264
What I Have Learned
Activity 5: Places of Possible Hazards
5.1 The table below showed places where potential hazards may occur. Write the
possible hazards for the given places.
IN THE CLASSROOM AND
CORRIDORS:
1.
2.
3.
4.
5.
ON THE TERRITORY
SURROUNDING THE SCHOOL
1.
2.
3.
4.
5.
IN THE SCHOOL BUILDING
IN THE SETTLEMENT
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Guide Questions:
1. What will you do if you are: a.) in the classroom or corridor, b) on the
territory surrounding the school, c.) in the school building and d.) in
the settlement when an earthquake happens?
2. Which places are the most dangerous?
3. Whose instructions should you follow? What should you do if you are
alone?
4. It might happen that your family members are not nearby. Who
should you call to receive help after an earthquake? Do you know the
telephone numbers?
Activity 5.2 My Geologic Hazards Experience
Write at least four (4) hazards you have experienced in your locality. Then make a
slogan on how these hazards affect the people as well as the environment.
265
What I Can Do
Hazards may pose danger to our lives. Let us be prepared and protect ourselves. As
students, how are you going to protect your lives in times of hazards? In the table
below, write a step by step procedure of preparing and protecting yourselves in times
of geologic hazards.
Step by Step Procedure of Preparing and Protecting Ourselves in
Times of Geologic Hazards
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Assessment
Directions: Read each statement and choose the letter of the correct answer. Write
your answer on a separate sheet of paper.
1. Which of the following may result in falling rocks and debris that collide with
people, buildings, and vehicles?
A. earthquake
C. tsunami
B. land slide
D. typhoons
266
2. Which of the following is NOT a volcanic hazard?
A. flooding
C. lava
B. lahars
D. pyroclastic flows
3. Which of the following is an example of a hazard associated with
earthquake?
A. eutrophication
C. flooding
B. ground shaking
D. pyroclastic density currents
4. What is the main reason why the Philippines has suffered from numerous
geologic processes and calamities?
A. its economic status
B. its location (Ring of fire)
C. Philippines is 3rd a world country
D. something to do with human population
5. Which of the following hazards undermine the foundations and supports of
buildings, bridges, pipelines, and roads, causing them to sink into the
ground, collapse, or dissolve?
A. eutrophication
C. liquefaction
B. ground shaking
D. pyroclastic density currents
6. Which of the following is NOT a natural hazard?
A. hurricane
C. house fire
B. tsunami
D. earthquake
7. Which of the following is/are geologic hazard/s?
A. earthquake
B. volcanoes
C. waves pounding on a coast
D. all of these are geologic hazards
8. What natural hazard is involved when rock underground suddenly breaks
along a fault causing tectonic movement?
A. volcanic eruption
C. cyclone
B. earthquake
D. hurricane
9. What causes an earthquake?
A. glacier
B. very large storm
C. landslide
D. a movement along fault
10. What do you call this hazard which involves the giant waves which can
move at speeds of up to 500 miles an hour and reach heights of
hundreds
of feet? at s
A. ground shaking
C. landslides
B. liquefaction
D. tsunami
11. Which of the following describes the vibration of the ground during an
earthquake?
A. ground shaking
C. landslides
B. liquefaction
D. tsunami
267
12. What natural hazard has the effects of reshaping new land, debris
avalanche, destroyed forests, and death to many animals?
A. volcanic eruption
C. hurricane
B. earthquake
D. tsunami
13. A natural physical process becomes a natural hazard when the
process becomes ____.
A. scary
B. dormant and inactive
C. faster than usual
D. extreme and unpredictable
14. What is the process during earthquake shaking where sand and silt
grains in wet soil are rearranged, and the water in the spaces between
the grains is squeezed?
A. ground shaking
C. liquefaction
B. landslides
D. tsunami
15. What refers to the sliding down of a mass of earth or rock from a
mountain or cliff?
A. ground shaking
B. landslides
C. liquefaction
D. tsunami
Additional Activities
List down the several geologic hazards that happened in our country and
explain how these affect the people and the environment.
268
269
1. B
2. A
3. D
4. C
5. B
6. B
7. A
8. B
9. D
10.C
11.C
12.D
13.A
14.D
15.D
What's In
1. GROUND
SHAKING
2. TSUNAMI
3. LIQUEFACTION
4. LANDSLIDE
Assessment
1. B
2. A
3. B
4. B
5. C
6. C
7. D
8. B
9. D
10.D
11.A
12.A
13.D
14.C
15.B
Answer Key
What I Know
References
Ball, Jessica. 2020. Volcanic Hazards, Many Types of Hazards Are Associated with
Volcanoes, accessed May 24, 2020,
https://geology.com/volcanoes/volcanic-hazards/?fbclid=IwAR1jTDFM6bE_wZkKxwgfLv7-jgslBKzipabK-TrsVUkjr33ONWVDe309EY
Fisher,
Richard.
1997.
Hazardous
Volcanic
Events,
accessed
May
25,
2020,http://volcanology.geol.ucsb.edu/hazards.htm?fbclid=IwAR24qqc2Y0v
GqkKxVpspYr66HAZa5oVaVq5ywUsIW1OfKgPLMNCI8hSoyg8#:~:text=Tephr
a%20falls%20and%20Ballistic%20Projectiles,bombs%20(%3E64%20mm)
India Environmental Portal. 1993. Human Activity Causes Increase in Landslides,
accessed May 23, 2020, http://www.indiaenvironmentportal.org
.in/content/10143/human-activity-causes-increase-inlandslides/?fbclid=
IwAR0kEgAel6qefrlm8R8OvyRzYgHJV_dXd4vXUSq2vi8UKYf1C6xX6Xfj8G8
Ureta, Romnick. 2016. Human Actions that Speed Up Landslides, accessed May
24, 2020, https://www.slideshare.net/RomnickUreta/human-actions-thatspeed-up-landslides?from_action=save&fbclid=IwAR2XcM0s1Ca-YbGG2WYh0RCf8hWRcABY3R79zxbLO_S6G9F5Uoupupy6
270
Earth and Life Science
Geologic Processes and Hazards
Earth and Life Science – Senior High School
Geologic Processes and Hazards
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the
Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for
exploitation of such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this
module are owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use
these materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over
them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Franklin Galoyo, Ma. Rhoda E. Panganiban
Editors:
Erwin R. Abrencillo, Jocelyn M. Manset
Reviewers:
Dominic P. Almirez, Franz Kevin Manalo, Princess Paolah L. De Guzman, Marissa C. Betchaida, Louie L. Alvarez
Gregorio M. De Chavez, Jr., Jocelyn M. Manset, Mario B. Maramot, Elaine T. Balaogan, Job S. Zape Jr
Illustrator:
Ednelinda Robles, Cherry Amor Laroza, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan, Merthel M. Evardome, Nadine C. Celindro
Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan, Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
271
Week
7
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the nature of Earth and Life Science. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module has one lesson:
Lesson 2 – Geological Processes and Hazards
After going through this module, you are expected to:
1. identify places in the Philippines that are prone to geologic hazards like
earthquakes, volcanic eruptions, and landslides using hazard map; and
2. explain why it is important to identify places that are prone to geologic hazards.
What I Know
Directions. Read the following questions and choose the letter of the correct answer.
Write the chosen letter on a separate sheet of paper.
1. Which of the following is an example of geologic hazard?
A. tornado
C. flood
B. earthquakes
D. tropical cyclone
2. Where can you find the Pacific Ring of Fire?
A. Arctic Ocean
B. Indian Ocean
C. Pacific Ocean
D. Atlantic Ocean
3. What do you call the point of origin of an earthquake located just above the
focus?
A. divergent
C. epicenter
B. convergent
D. transform
4. Which type of map shows the risk of particular area to certain threat?
A. hazard
C. resource
B. physical
D. topographic
5. What type of hazard is climate and weather related?
A. natural
C. ergonomic
B. biological
D. anthropogenic
272
6. What refers to the movement of rock, debris, and soil down a slope?
A. tsunami
C. typhoon
B. landslide
D. volcanic eruption
7. Which of the following geologic features makes the provinces of La Union and
Pangasinan high risk to earthquakes?
A. Iba Fault
C. Tablas Fault
B. Manila Trench
D. Lianga Fault
8. Which of the following is responsible for plate movement?
A. gravitational force
C. convection current in mantle
B. radiation emitted by the Sun
D. attraction from the moon
9. All are examples of geologic hazards EXCEPT for _______________.
A. typhoon
C. landslides
B. earthquakes
D. volcanic eruptions
10. Which of the following areas is the LEAST prone to earthquakes?
A. Tarlac
C. Ifugao
B. Cavite
D. La Union
11. Which of the following areas has the HIGHEST risk of volcanic-related
disaster?
A. Sulu
C. Bataan
B. Albay
D. Biliran
12. Which of the following areas is LEAST at risk on landslide?
A. Cebu
C. Manila
B. Batangas
D. La Union
13. Which of the following is an example of natural hazard?
A. mining
C. landslide
B. deforestation
D. climate change
14. Which of the following factors makes the province of Benguet at risk to
earthquake?
A. high population
C. bodies of water around
B. presence of trees
D. topography and mountains
15. Why do you think the Visayas islands are NOT at risk to earthquakes? Due
to
A. lack of fault lines
C. lack of mountains
B. the presence of islands
D. the presence of plains
273
Lesson 2
Geological Processes and
Hazards
The Philippines is an archipelagoo that is made up of 7641 islands and home to
world-renown natural wonders and pristine water bodies. The country is in a unique
location because it rests in the Pacific Typhoon Belt and Pacific’s earthquake and
volcano Ring of Fire. The Ring of Fire is a home to over 75% of the world’s active and
dormant volcanoes. Because of its geographic location, the Philippines is among the
greatest hazard and disaster-prone countries in the world.
What’s In
The Philippines is no stranger to natural hazards. Every year, thousands to millions
of Filipinos are extremely affected by all forms of hazards such as earthquakes,
typhoons, and volcanic eruptions. These natural hazards may result in multiple
disasters.
Activity 1: Cause and Effect
Directions. Supply the blank boxes with the causes and effects from the given
geologic hazards.
Geologic Hazard
Volcanic Eruptions
Causes
Effects
Landslides
Earthquakes
What’s New
Geologic Process
Geological processes can be described as natural forces that shape the physical
makeup of a planet. These forces cause movements of plates in the Earth’s crust, the
area where humankind lives. As this processes occur from time to time, it poses
continuous source of hazards to people, community and society.
Hazards
A hazard is a phenomenon caused by natural or human forces which poses threat to
humans, animals, properties and environment. For instance, since the Philippines is
located within the Ring of Fire, the country experiences many earthquakes and
274
volcanic eruptions compared to other countries. Making the country one of the most
hazard-prone countries in the world.
Hazards can be classified as to natural and anthropogenic.
Natural: Earthquakes, volcanic eruptions, landslides and tsunamis (climate and
weather related hazards)
Anthropogenic: Deforestation, mining and climate change (man-made)
Hazard Map
It is a map that illustrates the areas that are exposed or prone to a particular
hazard. They are used for natural hazards such as landslides, flooding, volcanic
eruption and tsunami. It is also used to mitigate the potential negative effects of
these hazards
Activity 2: Point me
Every year, dozens of natural disasters strike our country. Some are just passing by
and some even make history because of massive destruction.
Directions. Since disasters are all over the
news, what are the places do you think that
have been affected by geologic hazards for the
past decade. Use the Philippine map on the
right side. Write your answers in the box
below.
Earthquakes
1.
2.
Volcanic Eruptions
1.
2.
Landslides
1.
2.
What is It
Now, you have learned that geologic location is the major reason why the Philippines
is a hazard-prone country. The Philippine government partnered other private
institutions to reduce the risk of hazards through producing hazard maps that are
publicly available. For example, the partnership of news networks with the Philippine
Institute of Volcanology and Seismology (PHIVOLCS). This partnership shares
valuable and scientific information which increases the public’s understanding on
geologic hazards and risks associated with it.
275
Another is Manila Observatory, a private non-stock and non-profit research
institution with the help of the Department of Environment and Natural Resources
(DENR. This partnership produced hazard maps that show vulnerability of the
country to environmental disasters.
Geophysical map
Over the past decades,
the PHILVOCS has recorded
twelve destructive earthquakes in
the Philippines that caused
unimaginable effects, such as
loss of properties, injuries, and
thousands of deaths.
Surigao Del Sur and Davao
Oriental are at risk to hazard due
to Philippine Trench and nearby
active faults, while La Union and
Pangasinan are due Manila
Trench. Moreover, Benguet, La
Union, Nueva Vizcaya, Eastern
Pangasinan and Nueva Ecija is
due its location along the
Philippine fault Zone. (Center for
Environmental Geomatics- Manila
Observatory, 2005)
276
First on the rank with the highest risk is
Camiguin because the land area was so small. If
volcanic eruption may occur, the whole province can
be affected. Sulu ranks second because it has the
greatest number of active and dangerous volcanoes.
(Center for Environmental Geomatics- Manila
Observatory, 2005)
Most of the provinces in the Cordillera
Administrative Region are included in the list of
top 10 landslide-prone areas in the Philippines.
Because the entire region is situated in and
around Cordillera Mountain ranges. So, after
massive and continuous rain or earthquakes,
certain areas on the hills and mountains become
delicate and weak which makes the region
exposed to landslides as well as to other
provinces that is why their area is classified as
rugged and mountainous with prominent flatlands.
277
What’s More
Activity 3: Identify me
Directions. Using the hazard map found on the previous pages, answer the
following questions.
1. Identify the top 3 places in the Philippines that are hazard-prone to volcanic
eruptions, earthquakes, and landslides. Justify your answers why they are
most prone.
2. What is the importance of using a hazard map?
What I Have Learned
Activity 4: Complete me
Directions. Read the following statements and complete them by filling in with the
correct term and/or phrase.
1. The Philippines experiences more earthquakes and volcanic eruptions
because it is located in the ______.
2. Earthquakes and volcanic eruptions are known as ______ type of hazards.
3. Surigao Del Sur and Davao Del Norte are at risk to hazard due to ______ and
______.
4. Camiguin has the highest risk of effects of a volcanic eruption because the
land area is too ______.
5. Man-made hazard is classified as ______.
What I Can Do
Activity 5: Hazard identification
Directions. Identify hazardous places during or after earthquakes on the following
locations.
1. Home
2. Classroom and school building
3. Community (e.g. barangay, municipality or provinces)
The answer must be something similar to this:
In the community: Damaged roads and bridges
278
Assessment
Directions. Read the following questions and choose the letter of the correct answer.
Write the chosen letter on a separate sheet of paper.
1. Which of the following is an example geologic hazard?
A. mining
C. earthquakes
B. deforestation
D. climate change
2. Which of the following maps is used to identify a place that is prone to
disaster?
A. hazard
C. physical
B. resource
D. topographic
3. How do you classify climate- and weather-related hazards?
A. natural
C. biological
B. chemical
D. anthropogenic
4. Which of the following geologic features makes the provinces of La Union and
Pangasinan pare at risk to earthquakes?
A. Iba Fault
C. Tablas Fault
B. Manila Trench
D. Lianga Fault
5. Which of the following provinces has the highest risk of volcanic eruptions
based on DENR and Manila observatory report?
A. Bataan
D. Sorsogon
B. Laguna
D. Camiguin
6. Which of the following is NOT among the provinces with high proneness to
landslide?
A. Cebu
C. La Union
B. Metro Manila
D. Mountain province
7. Which of the following is NOT included in the group?
A. mining
C. tsunamis
B. earthquakes
D. landslides
8. Which of the following area is LEAST prone to earthquakes?
A. Ifugao
C. Palawan
B. Tarlac
D. La Union
9. Which of the following provinces has the HIGHEST risk of volcanic-related
hazard?
A. Sulu
C. Laguna
B. Batangas
D. Batanes
10. Which of the following is NOT an example of geologic hazards?
A. landslides
C. earthquakes
B. tropical cyclones
D. volcanic eruptions
279
11. Where can you find the Ring of Fire?
A. Arctic Ocean
B. Indian Ocean
C. Pacific Ocean
D. Atlantic Ocean
12. Which of the following is an example of geologic hazard?
A. tornado
C. flood
B. tropical cyclone
D. earthquakes
13. What refers to the movement of rock, debris, and soil down a slope?
A. landslide
C. typhoon
B. earthquakes
D. volcanic eruptions
14. Why do you think that majority of the Cordillera Administrative Region are
included in the most landslide prone provinces in the Philippines? Because it
is
A. near from the sea
C. near in mountain ranges
B. situated near active volcanoes
D. near NCR
15. Which of the following area is LEAST prone to earthquakes?
A. Tarlac
C. Ifugao
B. Cavite
D. La Union
Additional Activities
Activity 6: Interview me
Directions. Interview a family member, a relative, neighbor or anyone who
experienced geologic hazards and answer the following questions below.
1. Have you ever experienced any form of geologic hazards such as volcanic
eruptions, earthquakes, and landslides? How did you feel? What did you do
during and after the situation?
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
2. If you have never experienced any form of hazards, look for someone who was
able to witness and experience it first-hand. Ask them their feelings and
thoughts during and after the hazard event. Also, ask them the things they
did during and after the scenario.
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
280
281
What Can I Do
What’s New
Activity 5
Activity 2
Answers may vary among
students
Answers may vary among
students
Assessment
What’s More
1. C
2. A
3. A
4. B
5. D
6. B
7. A
8. C
9. A
10. B
11. C
12. D
13. A
14. C
15. B
Additional Activities
Activity 3
Hazard map expose areas
that are at risk to certain
hazards.
Activity 1
What I Have Learned
Cause: Possible answers
Activity 6
Activity 4
Volcanic eruptions:
Camiguin, Sulu, and Biliran
Landslides: Marinduque,
Rizal and ,Cebu
1. Ring of fire
2. Natural
3. Philippine trench, active
faults
4. Small
5. Anthropogenic
What I Know
Earthquakes
-when rock underground
suddenly breaks along a
fault.
Volcanic Eruptions
-movement of tectonic plates
causing magma to rises to
the surface.
Landslides
-Slow weathering of rocks,
soil erosion, earthquakes
and volcanic activity
Effects: Answers may vary
among students
Answer Key
Answers may vary among
students
Earthquakes: Surigao Del
Sur, La Union, and Benguit
What I Know
1. B
2. C
3. C
4. A
5. A
6. B
7. B
8. C
9. A
10. B
11. A
12. C
13. C
14. D
15. A
References
Bagayas, Samantha. 2018. “Why Philippines and Indonesia are prone to natural
hazards?”. Rappler, October 19, 2018. Accessed May 19, 202.
https://www.rappler.com/move-ph/214623-why-philippines-indonesiaprone-natural-hazards
Dugo,
Fehl. 2017. “Why is the Philippines Prone to Typhoons and
Earthquakes?.”Accessed May 18, 2020. https://philpad.com/why-is-thephilippines-prone-to-typhoons-and-earthquakes/
Esquire Philippines. 2018.”The Philippines is Third-Riskiest Country When it Comes
to
Natural
Disasters.”
Accessed
May
18,
2020.
https://www.esquiremag.ph/life/travel/world-risk-index-2017-philippinesa00203-20180502
Ellis,
Jessica.2020.“What are Geological Processes?.” Accessed May
2020.https://www.wisegeek.com/what-are-geological-processes.htm
18,
The Manila Observatory.2005. “Mapping Philippine Vulnerability to Environmental
Disasters.” Accessed May 18, 2020.http://vm.observatory.ph/hazard.html
Nelson, Stephen A. 2018. “Natural Hazards and Natural Disaster”. Accessed May
19,2020.http://www.tulane.edu/~sanelson/Natural_Disasters/introduction.
htm
Prevention
web.
2015.
“Hazard.”.
Accessed
https://www.preventionweb.net/risk/hazard
May
19,
2020.
djohannelene. 2017. “Landslide Prone Area in the Philippines.” Accesses May 17,
2020.
https://theresilientperspective.wordpress.com/2017/01/13/landslideprone-area-in-the-philippines/
ProfProfsQuizzes. 2026. “Earthquakes! Phase 2 Quiz.” Accessed May 20, 2020.
https://www.proprofs.com/quiz-school/quizshow.php?title=earthquakesphase-2-quiz&q=1
National Curriculum and Assessment Centre, Georgia. 2012. “Teaching Disaster risk
Reduction with Interactive Methods.” Accessed May 19, 2020.
https://www.preventionweb.net/files/28375_28294engkatastrofebiweb2.pdf
?fbclid=IwAR377KPl7fZLYMdCEXPzorYSsSmxbY4Cwd4PLctcA_eM5IOrtsviM88QxY
Jacobs, Thea. 2020. “What causes a volcano to erupt, how they formed and different
types of volcano revealed.” The Sun, January 16, 2020. May 19, 2020.
https://www.thesun.co.uk/tech/6246894/volcano-formation-erruptionsdifferent-types/
282
Earth and Life Science
Geologic Processes and Hazards
Earth and Life Science – Senior High School
Geologic Processes and Hazards
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Ma. Rhoda E. Panganiban
Editors:
Erwin R. Abrencillo, Jocelyn M. Manset
Reviewers:
Dominic P. Almirez, Franz Kevin Manalo, Princess Paolah L. De Guzman, Marissa C. Betchaida,
Louie L. Alvarez, Gregorio M. De Chavez, Jr., Jocelyn M. Manset, Mario B. Maramot
Elaine T. Balaogan, ,Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Cherry Amor Laroza, Lovely Joy La Rosa, Charles Erick A. Jusay,
Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team: Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan, Merthel M. Evardome
Nadine C. Celindro, Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan,
Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
7
283
Week
7
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the nature of Earth and Life Science. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module covers:
Lesson 3: Geologic Processes and Hazards
After going through this module, you are expected to:
1. identify human activities that speed up or trigger landslides;
2. explain why it is important to identify human activities that speed up or
trigger landslides; and
3. cite some precautionary measures in preparing for the landslides.
What I Know
Directions. Read the following questions and choose the letter of the correct answer.
Write the chosen letter on a separate sheet of paper.
1. What refers to the movement of rock down a slope?
A. wave
C. tsunami
B. debris
D. landslide
2. Which among the following human activities DOES NOT speed up or trigger
landslide?
A. mining
C. overloading slopes
B. planting of trees
D. excavation or displacement of rock
3. Which of the following can trigger a landslide?
A. wind howl
C. car accident
B. earthquake
D. fire in a house
284
4. What refers to the exposure, processing and recording of archaeological
remains?
A. mining
C. quarrying
B. excavation
D. land pollution
5. What do you call the human activity that trigger landslides using explosives?
A. land use
C. mining
B. quarrying
D. excavation
6. What can you hear when there is a sudden landslide?
A. explosives
C. rain water
B. loud noise
D. rolling thunder
7. What makes road construction a possible cause of a landslide?
A. slope excavation
C. poor sanitation among workers
B. use of heavy equipment
D. lack of personal safety gears
8. Which of the following is NOT an example of land use?
A. surfing
C. quarrying
B. farming
D. house construction
9. What should be the initial reaction when there is a landslide?
A. scream loudly
C. call the emergency hotline
B. move away from the slope
D. take a picture and post in internet
10. Which among the following can trigger a landslide even if there is no human
activity present in an area?
A. gravity
C. lighting
B. thunder
D. forest fire
11. How does a community in an urbanized area speed up landslide?
A. planting trees
C. converting forest into farms
B. catching of wild animals
D. increasing the human population
285
12. Which among the following factors contributed MOST in a landslide during
quarrying?
A. blasting of rocks
C. use of heavy equipment
B. polluting the rivers
D. use of a variety of manpower
13. What makes a landslide dangerous to human lives?
A. It is fast and unpredictable.
C. It is as powerful as typhoon.
B. It can slowly diminish population.
D. It can be avoided by running.
14. How can a community avoid the occurrence of a landslide in the future?
A. avoid creating loud noises
C. plant more trees in the slope
B. call the emergency hotline
D. construct more buildings
15. Which among the following human activities can trigger a landslide?
I.
musical concert
II.
building being demolished
III.
woman dancing on top of a pole
IV.
team of construction workers clearing trees for a new road
A. I and III
C. II, III and IV
B. II and IV
D. I, II, III and IV
Lesson 3
Geological Processes and
Hazards
Landslide is the movement of rock down a slope where human activities play an
important role in speeding up or triggering its occurrences. This module will help
determine and cite some human activities that may speed up or trigger landslides.
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What’s In
Activity 1: Loop Me In
What are the human activities that speed up or trigger landslides? Can you name
some?
Directions. Encircle the word or group of words that speed up or trigger landslides
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What’s New
Landslide is an occurrence in which soil, rocks and vegetal debris are
transported suddenly or slowly down a slope due to insufficient stability. It
may happen when there is continuous rainfall, earthquakes and/or volcanic
eruption accompanied by a very loud noise
Landslide can be resulted from the failure of the materials to make up
the hill slope, and get driven by the force of gravity. Landslide is also known
as landslips, slumps or slope failure.
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Below is an image of landslide due to human activities:
Figure 1. An illustration of landslide occurrence
Listed below are some of the human activities that speed up or trigger landslide:
a.
b.
c.
d.
e.
f.
g.
h.
Overloading slopes
Mining which uses explosives underground
Excavation or displacement of rocks.
Land use such as modification of slopes by construction of roads,
railways, buildings, houses, etc.
Quarrying which includes excavation or pit, open to the air, from which
building stone, slate, or the like is obtained by cutting, blasting, etc.
Land pollution which is the degradation of earth’s land surface,
exploitation of minerals and improper use of soil by inadequate
agricultural practices.
Excavation which pertains to exposure, processing, and recording of
archaeological remains
Cutting Trees that can lead to deforestation and may encourage
landslide
Due to these human activities, several effects of landslides were noted. These
cause property damage, injury and death and adversely affect a variety of resources.
For example, water supplies, fisheries, sewage disposal systems, forests, dams and
roadways can be affected for years after a slide event. The negative economic effects
of landslides include the cost to repair structures, loss of property value, disruption
of transportation routes, medical costs in the event of injury, and indirect costs such
as lost timber and lost fish stocks. Water availability, quantity and quality can be
affected by landslides. Geotechnical studies and engineering projects to assess and
stabilize potentially dangerous sites can be costly.
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Are we prepared in case of landslides? These are some precautionary
measures to observe and follow in preparing for landslides:
a. Stay alert and awake. Many debris-flow fatalities occur when people are
sleeping.
b. If you are in areas susceptible to landslides and debris flows, consider
leaving if it is safe to do so.
c. Listen for any unusual sounds that might indicate moving debris, such as
trees cracking or boulders knocking together.
d. If you are near a stream or channel, be alert for any sudden increase or
decrease in water flow and for a change from clear to muddy water.
e. Be especially alert when driving. Bridges may be washed out, and culverts
overtop.
f. Be aware that strong shaking from earthquakes can induce or intensify
the effects of landslides.
What is It
Activity 2: List and Describe
Directions. On the box provided below, list down the human activities that cause
landslides. Describe each one how they contribute to the cause of such hazardous
event.
What’s More
Activity 3: Share It
Directions. Have you experienced landslide in your community? What are the
causes of such event? Share your experience. If not, kindly interview a person who
has a first-hand experience to landslides and ask his feelings, thoughts and actions
toward the event.
__________________________________________________________________________________
__________________________________________________________________________________
What I Have Learned
Activity 4: My Take in Landslides
Directions. In a short bond paper, prepare a poster showing human actions to be
conducted to mitigate the hazards posed by landslides.
The following criteria will be used to evaluate the output:
Connection to the topic
Layout and design
5 points
5 points
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Neatness of output
Organization
TOTAL
5 points
5 points
20 points
Post your draft here
What I Can Do
Activity 5: My Share
Directions. People must be mindful and careful enough doing activities that may
lead to occurrence of landslides. As a student, how will you do your part in preventing
landslides as to information dissemination, awareness and mitigation planning?
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
_________
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Assessment
Directions. Read the following questions and choose the letter of the correct answer.
Write the chosen letter on a separate sheet of paper.
1. Which of the following is NOT an effect of landslide?
A. damage to property
C. death
B. injury
D. extreme heat
2. What refers to the use of explosives underground?
A. mining
C. quarrying
B. excavation
D. land pollution
3. What refers to the movement of rock down a slope?
A. wave
C. tsunami
B. debris
D. landslide
4. What will you do when there is a sudden landslide?
A. stay alert and awake
C. call the neighbor
B. wait for the rescue
D. stay cool
5. What makes railway and building construction a possible cause of a
landslide?
A. slope excavation
C. poor sanitation among workers
B. use of heavy equipment
D. lack of personal safety gears
6. Which among the following human activities speed up or trigger landslide?
A. mining
C. watering the plants
B. planting of trees
D. cooking
7. Which of following is the human activity that trigger landslides using
excavation or pit?
A. land use
C. mining
B. quarrying
D. excavation
8. Which of the following is an example of land use?
A. surfing
C. scuba
B. parasailing
D. construction of houses
9. What should be the initial reaction when there is a landslide?
A. scream loudly
C. call the emergency hotline
B. move away from the slope
D. take a picture and post in internet
10. Which among the following can trigger a landslide even if there is no human
activity present in an area?
A. gravity
C. lighting
B. thunder
D. forest fire
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11. How does a deforestation speed up landslide?
A. due to the planting trees
B. due to the cutting of trees
C. catching of wild animals
D. increasing the human population
12. Which among the following factors contributed MOST in a landslide during
land pollution?
A. blasting of rocks
C. use of heavy equipment
B. improper use of soil
D. use of a variety of manpower
13. What makes a landslide dangerous to human lives?
A. It is fast and unpredictable.
C. It is as powerful as typhoon.
B. It can slowly diminish population. D. It can be avoided by running.
14. Which
I.
II.
III.
IV.
among the following human activities can trigger a landslide?
building being demolished
musical concert
team of construction workers clearing trees for a new road
woman dancing on top of a pole
A. I and III
B. II and IV
C. II, III and IV
D. I, II, III and IV
15. How can a community avoid the occurrence of a landslide in the future?
A. avoid creating loud noises
C. plant more trees in the slope
B. call the emergency hotline
D. construct more buildings
Additional Activities
Directions. Look for a news article concerning the occurrence of landslide. Identify
the following elements in the news article:
Title:
____________________________________________________________
Author:
____________________________________________________________
Basic Information:
What?
____________________________________________________________
Who?
____________________________________________________________
When?
____________________________________________________________
Where?
____________________________________________________________
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Why?
____________________________________________________________
How?
____________________________________________________________
If you are in the position of the authorities, youth leaders or community members,
what preventive measures will you implement to address the problems presented in
the article?
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
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What I Know
What's in
Assessment
1. D
2. B
3. B
4. B
5. C
6. B
7. A
8. A
9. B
10. A
11. C
12. A
13. A
14. C
15. B
Activity 1
explosives
excavation
mining
1. D
2. A
3. D
4. A
5. A
6. A
7. B
8. D
9. B
10. A
11. B
12. B
13. A
14. A
15. C
Answer Key
References
India Environmental Portal. (1993). “Human activity causes increase in landslides.”
AccessedMay23,2020.http://www.indiaenvironmentportal.org.in/content/1
0143/human-activity-causes-increase-in-landslides/
?fbclid=IwAR0kEgAel6qefrlm8R8OvyRzYgHJV_dXd4vXUSq2vi8UKYf1C6xX6
Xfj8G8
Ureta, Romnick. (2016). “Human actions that speed up landslides.” Accessed may
24, 2020. https://www.slideshare.net/RomnickUreta/human-actions-thatspeed-up-landslides?from_action=save&fbclid=IwAR2XcM0s1Ca-YbGG2WYh0RCf8hWRcABY3R79zxbLO_S6G9F5Uoupupy6vA
USGS
(2020). “Landslide Hazards Program.” Accessed June 13,2019.
https://www.usgs.gov/natural-hazards/landslide-hazards/education
Washington, D.C., 2007. “Talking About Disaster: Guide for Standard Messages.”
Accessed
2012.
http://disastercenter.com/New%20Guide/Landslides.html#:~:text=Landslid
es%20cause%20property%20damage%2C%20injury,years%20after%20a%20
slide%20event.
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Earth and Life Science
Hydrometeorological
Phenomena and Hazards
Earth and Life Science – Senior High School
Hydrometeorological Phenomena and Hazards
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers:
Editors:
Franklin Galoyo
Erwin R. Abrencillo, Jocelyn M. Manset
Reviewers:
Dominic P. Almirez, Franz Kevin Manalo, Princess Paolah L. De Guzman, Marissa C. Betchaida,
Job S. Zape Jr. Louie L. Alvarez, Gregorio M. De Chavez, Jr., Jocelyn M. Manset, Mario B. Maramot,
Elaine T. Balaogan
Illustrator:
Ednelinda Robles, Cherry Amor Laroza, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan, Merthel M. Evardome, Nadine C. Celindro
Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan, Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
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Week
8
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the nature of Earth and Life Science. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module has one lesson:
Lesson 1 – Hydrometeorological Phenomena and Hazards
After going through this module, you are expected to:
1. identify places in the Philippines that are prone to hydrometeorological hazards
like tropical cyclones, monsoons, floods, or ipo-ipo using hazard map; and
2. explain why it is important to identify places that are prone to
hydrometeorological hazards.
What I Know
Directions. Read the following questions and choose the letter of the correct answer.
Write the chosen letter on a separate sheet of paper.
1. What is the highest signal number can be found on PAG-ASA’s revised storm
earning system?
A. 3
C. 7
B. 5
D. 9
2. What is the English term for bagyo?
A. storm
B. typhoon
C. thunderstorm
D. tropical depression
3. Which of the following is NOT included in the group?
A. flood
C. typhoon
B. tornado
D. tsunami
4. What is described as the region of the calmest weather at the center of
tropical cyclone?
A. eye
C. eye wall
B. inner bands
D. epicenter
5. What do you call to the cyclones occurring in the North Atlantic Ocean?
A. typhoon
C. hurricanes
B. tornado
D. thunderstorm
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6. When does the Southwest Monsoon usually occur in the Philippines?
A. March - May
C. October - March
B. July - December
D. June – September
7. What is the main cause of tornadoes?
A. Floods
B. Thunderstorm
8.
C. Hurricanes
D. Tropical Storm
Which among the following is the MOST damaging result of a tropical
cyclone?
A. Rain
C. Flood
B. Storm surge
D. High winds
9. What year did typhoon Haiphong land in the Philippines?
A. 1881
C. 1867
B. 1991
D. 2013
10. Which region in the Philippines is the most exposed to tropical cyclones?
A. Region I
C. Region III
B. Region V
D. Region XI
11. Which of the following reasons makes Pampanga the province that is most
prone to flood?
A. low lying area
C. facing towards the sea
B. highly populated
D. composed of mountains
12. Which of the following places of is LEAST likely at risk for typhoon?
C. Albay
C. Batangas
D. Cagayan
D. Sorsogon
13. What makes BICOL region prone to typhoon?
A. facing towards the Pacific Ocean
C. has lots of rivers
B. composed of mountains
D. low lying areas
14. If you would like to settle to a province that is least prone to typhoon and
flood, which among the following provinces will be a good option?
A. Albay
C. Maguindanao
B. Tarlac
D. Negros Oriental
15. What year did typhoon Yolanda landed in the Philippines?
A. 2000
C. 1988
B. 2013
D. 2016
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Lesson 3
Hydrometeorological Phenomena and
Hazards
The Philippines has a tropical and maritime climate. Annually, the country is visited
by an average of 20 typhoons, five to nine of which are highly destructive. The
Philippines is situated in the Pacific typhoon belt thus, the country is highly prone
to hydrometeorological hazards. Oftentimes, multiple hazards occur simultaneously.
What’s In
Previously, we learned that geologic processes cause different hazards such as
earthquakes, volcanic eruption and landslides. These has caused unimaginable
impact to people and their properties. Being situated in in the tropics, the Philippines
is found to be more exposed and vulnerable to hydrometeorological hazards
compared to other countries. Philippines is also a tropical country with only wet and
dry seasons.
Activity 1: Find Me
Directions. Locate and encircle words that are related to human activities that
speed up or trigger landslides. Terms can be found horizontally, vertically, diagonally
or even backward.
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What’s New
Activity 2: Decode Me
Directions. Presented below is a crossword puzzle. Using the jumbled letters as
clues, rearrange them to decipher a term that fits in the corresponding boxes
across and down.
1
2
3
4
5
6
7
Across
Down
3. IOP-IPO
1. RHAZASD
5. CIATRLPO SELCONYC
2. OSOSONMN
6. DGTHRUO
4. KRIS
7. SLDFOO
What is It
Hydrometeorological hazards
They are brought by extreme meteorological and climate phenomena that includes
tropical cyclones, thunderstorms, tornado (ipo-ipo) drought, and floods.
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Tropical cyclones
Tropical cyclones are known in various names depending on the country where you
live. In the Western North Pacific around the Philippines, Japan, and China the
storms are known as typhoons, while in the North Atlantic Ocean and the Eastern
North Pacific they are referred to as hurricane. Here are the top five destructive
typhoons to ever hit the country: Typhoon Haiphong (1881), Typhoon Haiyan
(Yolanda) (2013), Tropical storm Thelma (Uring) (1991), Typhoon Bopha (Pablo)
(2012), and Typhoon Angela (1867).
Monsoons
A monsoon is a seasonal wind and rains pattern, and the word “monsoon” believed
to be originated from the Arabic word mawsim (season), via Portuguese and the
Dutch monsun. There are two known monsoons in the Philippines that occur every
year: Summer Southwest (Habagat) and Winter Northeast Monsoon (Amihan).
1. Amihan: brings cloudless skies and nippy mornings during the dry season
(October to late March)
2. Habagat: brings heavy rains and some deadly typhoons (June to September)
Floods
Flood is as an abnormal progressive rise in the water level of a stream that may result
in the over-flowing by the water of the normal confines of the stream. A flood can
vary in size, speed of water, and duration.
Tornado (Ipo-ipo)
A tornado is a narrow, violently rotating column of air that extends from a
thunderstorm to the ground. The main cause of tornadoes are thunderstorms though
tornadoes are not common in the Philippines, still it can occur at any time of the
year.
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Northern Luzon, Southeastern
Luzon and Eastern Visayas are
the areas highly at risk to the
occurrence
of
tropical
depressions, tropical storms,
typhoons and super typhoons.
Did you know?
Typhoon Haiphong in 1881, ranks
as number one deadliest typhoon
that crossed the Philippines.
Haiyan (Yolanda) in 2013 is known
Pampanga, Nueva Ecija, Tarlac, and Bulacan
provinces make Region III as the most
exposed region in the country to tropical
cyclones.
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What’s More
Activity 3: Identify me
Directions. Familiarize yourself with the hazard map from previous page and answer
the following questions.
1. Identify the places in the Philippines that are both prone to typhoons and
floods. Justify your answers.
2. What is the importance of using hazard map?
What I Have Learned
Activity 4: Complete me
Directions. Read the following statements. Complete them by filling in the blanks
with the correct term or phrases.
1.
2.
3.
4.
5.
Seasonal wind and rain pattern phenomena are referred as ___________.
In average, ____ typhoons visited Philippines every year.
In the Philippines, tropical cyclones are popularly known as ____________.
In 1988 the deadliest typhoon ever hit in the Philippines is __________.
The most flood-prone province in the Philippines is ______________.
What I Have Learned
Activity 5: Hazard identification
Directions. Identify the situation that put humankind at risk on the following
locations:
1. Home
2. Classroom
3. Community (e.g. barangay, municipality or provinces)
The answer must be something similar to this:
In the community: mining and quarrying may speedup landslides
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Assessment
Directions. Read the following questions and choose the letter of the correct answer.
Write your answer on a separate sheet of paper.
1. What is the name of the deadliest typhoon ever hit the Philippines in 1881?
A. Uring
C. Angela
B. Thelma
D. Haiphong
2. What monsoon brings cloudless skies and nippy mornings during the dry
season?
A. easterlies
C. winter northeast
B. summer southwest
D. low pressure area
3. What are the two seasons in the Philippines?
A. wet and dry
C. summer and winter
B. hot and cold
D. autumn and spring
4. Which of the following is the MOST exposed region in the country to tropical
cyclones?
A. Region I
C. Region III
B. Region II
D. Region IV
5. What ocean is located in the eastern part of the Philippines in which most
typhoons are originated?
A. Arctic
C. Pacific
B. Indian
D. Atlantic
6. Which of the following is an EXCEPTION on the variation of flood?
A. size
C. speed
B. color
D. duration
7. Which of the following is NOT a hydrometeorological hazard?
A. cyclone
C. monsoon
B. typhoon
D. tsunami
8. What is the highest category in the typhoon warning signal system in the
Philippines?
A. 2
C. 4
B. 3
D. 5
9. What is the usual movement of typhoon that is coming from the Pacific Ocean?
A. northwest
C. southern
B. southwest
D. northern
10. Which among the following provinces has high risk to typhoons?
A. Albay
C. Sorsogon
B. Masbate
D. Pampanga
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11. Which among the following provinces has low risk in flood?
A. Tarlac
C. Marinduque
B. Bulacan
D. Maguindanao
12. What makes Palawan an ideal province to live in relation to
hydrometeorological hazard?
A. high risk in typhoon but low risk in flood C. low risk both in typhoon and flood
B. low risk in typhoon but high risk in flood D. high risk both in typhoon and flood
13. Which of the following is MOST likely be affected by typhoon originated from
the West Philippine Sea and is moving northeast?
A. Albay
C. Zamboanga
B. Palawan
D. Negros Occidental
14. Why is the Philippines frequently visited by typhoon all year-round? Because
it is
A. highly populated
C. located near the Pacific Ocean
B. composed mostly of islands
D. near the western hemisphere
15. Samer would like to settle to a province that is LEAST prone to typhoon and
flood, which among the following provinces will be a good option?
A. Albay
C. Palawan
B. Tarlac
D. Pampanga
Additional Activities
Activity 6: Interview me
Directions. Read and answer the following.
1. Have you ever experienced any form of hydrometeorological hazards such as
tropical cyclones, monsoons, floods and ipo-ipo? How did you feel? What did
you do during and after the situation?
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
2. If you have never experienced any form of hydrometeorological hazards, look
for someone who was able to witness and experience it first-hand. Ask them
their feelings and thoughts during and after the hazard event. Also, ask them
the things they did during and after the scenario.
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
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What’s In
What I have Learned
Additional activities
Activity 1
Activity 4
Answers may vary among
students
Possible answers
1.
2.
3.
4.
5.
What’s more
What I Know
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
B
B
D
A
C
D
B
B
A
C
A
C
A
D
B
Activity 3
Pampanga, Nueva Ecija and
Tarlac
What’s New
Activity 2
Assessment
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
D
C
A
C
C
B
D
D
A
A
C
C
B
C
C
What Can I Do
Activity 5
Across
3 ipo-ipo
5 tropical cyclones
Answers may vary among
students
6 drought
7 floods
Down
1 hazard
2 monsoons
4 risk
Answer Key
Mining, Land use,
excavation, quarrying, land
pollution and overloading
slopes.
Monsoons
20
Hydrometeorological
Haiphong
Pampanga
References
Puerto Galera Yacht Club, Inc. 2020. “Amihan habagat | Northeast Monsoon |
Southwest Monsoon.” May 24, 2020. https://www.pgyc.org/monsoonweather.php
UNTV News. 2020. “PAGASA explains occurrence of tornado in Manila.” UN TV News
and
Rescue,
August
18,
2016.
Accessed
May
24,
2020.
https://www.untvweb.com/news/mayor-isko-pinabulaanan-ang-ulat-nahard-lockdown-sa-buong-maynila/
Gonzales, James. 2018. “The 10 Worst Typhoons to Ever Hit the Philippines.”
Accessed May 25, 2020. https://daydreaminginparadise.com/the-10-worsttyphoons-to-ever-hit-the-philippines/
The Manila Observatory.2005. “Mapping Philippine Vulnerability to Environmental
Disasters.” Accessed May 18, 2020.http://vm.observatory.ph/hazard.html
Fores, Marydel Mitch. 2017. “Top 15 Strongest Typhoons to hit in the Philippines.”
Accessed May 25, 2020. https://faq.ph/top-15-strongest-typhoons-to-hit-inthe-philippines/
Dizon, Joyce. (2020). “Hydrometeorological Hazards Quizlet.” Accessed May 26,
2020. https://quizlet.com/174973340/hydrometeorological-hazards-flashcards/
The State of Queensland. (2020). “Take the floods quiz.” Accessed May 26, 2020.
https://www.chiefscientist.qld.gov.au/publications/understandingfloods/floods-quiz
307
Earth and Life Science
Marine and Coastal Processes
Earth and Life Science
Marine and Coastal Processes
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writer:
Mario A. Cudiamat
Editors:
Erwin R. Abrencillo, Jocelyn M. Manset
Reviewers:
Dominic P. Almirez, Franz Kevin Manalo, Princess Paolah L. De Guzman, Marissa C. Betchaida,
Louie L. Alvarez, Gregorio M. De Chavez, Jr., Jocelyn M. Manset, Mario B. Maramot, Elaine T. Balaogan,
Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Cherry Amor Laroza, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Job S. Zape Jr., Elaine T. Balaogan, Merthel M. Evardome, Nadine C. Celindro,
Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan, Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
308
Week
8
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the nature of Earth and Life Science. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module is composed of one lesson, namely:
Lesson 1 – Effects of Marine and Coastal Processes
After going through this module, you are expected to:
1. describe how marine and coastal processes result to coastal hazards; and
2. explain how coastal erosion, submersion and saltwater intrusion occur.
What I Know
Directions. Read the following questions and choose the letter of the best answer.
Write the chosen letter on a separate sheet of paper.
1. Based on the recent estimate of the National Mapping and Resource
Information Authority (NAMRIA), how many islands does the Philippines have?
A. 7,107
B. 7, 330
C. 7, 450
D. 7, 641
2. What are the two ions that mainly compose seawater?
A. hydrogen and potassium
B. hydrogen and oxygen
C. sodium and chlorine
D. nitrogen and phosphorus
3. Which of the following is NOT a coastal process?
A. waves
B. storm surge
C. tides
D. landslide
309
4. Which of the following is NOT an example of ecosystem present in the marine
environment?
A. mangroves
B. seagrass
C. dipterocarps
D. coral reef
5. What can be attributed to the melting of the iceberg in the polar region?
A. rising temperature
B. ozone depletion
C. chemicals in the atmosphere
D. all of the above
6. What refers to the study of the processes associated with marine and coastal
ecosystem?
A. Biology
B. Chemistry
C. Oceanography
D. Physics
7. Which of the following forces is responsible for tides?
A. gravitational
B. electrical
C. nuclear
D. frictional
8. What refers to the rising of seawater due to pressure and wind associated with
a storm?
A. tides
B. crustal movement
C. storm surge
D. waves
9. What refers to a steep rock face?
A. cave
B. stack
C. cliff
D. bar
10. What do you call the vibrations or shaking of the Earth’s surface caused by
the rapid movement of rocks in the crust?
A. shadow zones
B. earthquakes
C. tsunami
D. hot spot
310
11. What do you call the most common feature formed by wave deposition?
A. stack
B. tombolo
C. beach
D. spit
12. Which of the following fields of science is concerned with the study of weather
and climate as well as the processes involved in it?
A. Hydrology
B. Marine Science
C. Meteorology
D. Limnology
13. Which of the following is attributed to the rising of sea level?
A. snow
B. continents
C. glaciers
D. crust
14. These are caused by heavy and steady rains and poor drainage system in lowlying areas.
A. drought
B. floods
C. cyclones
D. hurricane
15. All of following statements about coastal processes is true EXCEPT
A. Beach is prone to erosion.
B. Erosion only occurs in the upland areas.
C. Wind is a contributory factor to storm surge.
D. Ocean waves cause water to move in the seashore
Lesson 1
Processes
The coast is one of the most dynamic parts of the Earth’s surface. It contains some
of the world’s sensitive and threatened ecosystems such as mangroves and beach
forest, seagrass and coral reefs. The dynamics of the marine environment result to
different processes that affect human communities and organisms in the coastal
ecosystem. Some of these processes result to natural hazards.
311
Marine systems are referred to as the world’s oceans while coastal systems refer to
the interface between oceans and land, extending seawards to about the middle of
the continental shelf and inland to include all areas strongly influenced by the oceans
(Millennium Ecosystem Assessment, 2005). About 23% of the world’s population live
within 100 km of the coast and about 10% live in extremely low-lying areas. Many of
these processes like coastal erosion, storm surges, coastal flooding, and tsunami.
Figure 1. Beach coast in Calatagan, Batangas (Photo taken by M. Cudiamat)
What’s In
You have learned previously that marine systems are much broader compared to
coastal systems. Coastal processes are activities that regularly happen in the marine
ecosystem as influenced by the weather, climate and the adjacent landscape. Let us
check if you still remember the different marine and coastal processes through this
review.
Activity 1: Word Decoding
Directions. Rearrange the jumbled letters and identify the term being referred to in
each of the following items. Write your answer on the space provided.
1. These are caused by the gravitational pull between the moon and Earth.
E
I
T
S
D
2. They are formed by the wind and storm in the ocean.
S
W
V
E
S
312
3. This is caused by the melting of glaciers and iceberg.
E
V
L
E
L
E
S
A
E
S
I
R
4. It refers to the motion of the outermost shell of the Earth.
S
A
C
U
R
L
T
N
T
E
V
M
O
M
E
5. This is the rising of the seawater due to atmospheric conditions.
U
R
E
G
S
R
M
T
O
S
Activity 2: My Picture of Human and Coastal Environment
Directions. On the box provided below, draw a coastline that will show the
interaction of humans and the coastal environment using the coastal terms listed
below. Then, describe your illustration in not less than 3-sentences.
Humans
Beach
Coastal forest/trees
Estuary/river
Waves
313
What’s New
Revisiting Marine and Coastal Processes
What have you noticed about the terms used in the previous activity? Actually, they
are all marine and coastal processes. The scientific field dealing with these processes
happening in our major oceans and seas is called oceanography. It is an
interdisciplinary field of science that integrates the different fields such as physics,
chemistry, biology, geology, meteorology, mathematics and even the social sciences
to understand the link between humans and oceans. Coastal processes are activities
or events happening in the marine environment. These are driven by the different
environmental factors such as atmospheric pressure, temperature, movement of the
Earth, moon and other dynamic changes in the ocean.
Now, let us talk about the different coastal processes in details.
Coastal processes include waves, tides, sea level change, crustal movement and
storm surge. Waves are caused by the movement of the air masses in the coastal
environment. Tides refer to the gravitational pull between the Earth and the moon.
Sea level change is a result of the rise of ocean water which can be attributed to the
melting of glaciers or iceberg in the polar regions. Storm surge refers to the rising of
seawater due to changes in pressure and wind associated with a storm. Crustal
movement is caused by the motion of the oceanic and continental crust of the Earth.
Effects of Marine and Coastal Processes
The different coastal processes described above may result to coastal hazards.
Coastal hazards are physical phenomena that expose the marine environment to
risk of property damage, loss of life and ecological degradation (Figure 2).
Coastal Hazards
Coastal Erosion
Saltwater Intrusion
Figure 2. Concept map of coastal hazards
314
Submersion
Coastal Erosion
It is the loss or displacement of land along the coastline due to the action of waves,
currents, tides, wind-driven water or other impacts of storms. Coastal erosion is a
type of coastal hazard which is brought about by the different coastal processes.
Figure 3. Coastal Erosion
Saltwater Intrusion
It is a major concern commonly found in coastal aquifers around the world. An
aquifer is an underground layer of permeable rock, gravel, sand or silt. Groundwater
from an aquifer is usually extracted by a water well. Once an aquifer becomes
contaminated it becomes unusable anywhere from 2 weeks to 10,000 years.
Saltwater intrusion is the induced flow of seawater into freshwater aquifers primarily
caused by groundwater development near the coast.
Figure 4. Aquifer
315
Figure 5. Saltwater intrusion
Submersion
It refers to the movement of coastal sediments from the visible portion of a beach to
the submerged nearshore region of the coast.
Figure 6. Submersion
316
What is It
The figure below shows the link between marine and coastal processes and coastal
hazards. These processes could lead to hazards in the coastline that can be mitigated
through different coastal management techniques which you will study in the next
module.
Marine and coastal processes
such as waves, tides, sea level change, storm surge and crustal
movement
have environmental effects that may result to
Coastal Hazards
Coastal Erosion
Saltwater Intrusion
Submersion
Figure 7. Concept map of the relationship between marine and
coastal processes and coastal hazards
317
What’s More
Activity 3. Picture Analysis
Directions. Take a look at the pictures presented below. Describe how prone or
vulnerable the places are to coastal hazards. Discussions must be at least 2
sentences.
Figure 8. Calatagan coastline (Photo taken during fieldwork of M. Cudiamat)
Figure 9. Part of a river leading to mangrove forest in Mogpog, Marinduque
(Photo taken during fieldwork of M. Cudiamat)
318
Figure 10. Exposed beach front during low tide in Bali, Indonesia
(Photo taken by M. Cudiamat)
Activity 4. Poster Making
Directions. Prepare a poster with the theme: “Coastal Processes and their Impacts
to Society”. Scoring criteria are as follows:
Relevance to the theme
Creativity
Originality
TOTAL
4 points
3 points
3 points
10 points
Post your draft here
319
What I Have Learned
Let us take a look at the main points of this module.
1. Ocean is a dynamic part of the planet Earth.
2. Marine systems are referred to as the world’s oceans.
3. Coastal systems refer to the interface between oceans and land strongly
influenced by the marine system.
4. Marine and coastal processes include waves, tides, sea level change,
storm surge and crustal movement which affect the coastal systems.
5. Coastal hazards are physical phenomena that expose the marine
environment to risk of property damage, loss of life and ecological
degradation.
6. Some of the coastal hazards include coastal erosion, submersion and
saltwater intrusion.
7. Coastal erosion is a process where land or sediment attached to
coastline is displaced due to the action of waves, currents, tides, and
other weather disturbances such as typhoon.
8. Submersion refers to the movement of coastal sediments from the
visible portion of a beach to the submerged nearshore region of the
coast.
9. Saltwater intrusion pertains to an induced flow of seawater into
freshwater aquifers primarily caused by groundwater development near
the coast
What I Can Do
Directions: As a Senior High School student, how can you help the local government
to mitigate the harmful effects of coastal and marine processes such as coastal
erosion, submersion and saltwater intrusion assuming that your community is prone
to these coastal hazards.
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
320
Assessment
Directions. Read the following questions and choose the letter of the best answer.
Write the chosen letter on a separate sheet of paper.
1. Which of the following is NOT a coastal process?
A. waves
C. tides
B. storm surge
D. landslides
2. Which of the following is caused by the gravitational pull of the moon and
Earth?
A. tides
C. sea level rise
B. storm surge
D. tsunami
3. Which of the following is attributed to the rising of sea level in the polar
region?
A. snow
B. continents
C. glaciers
D. crust
4. What refers to the rising of seawater due to pressure and wind associated
with a storm?
A. tides
B. crustal movement
C. storm surge
D. waves
5. Which of the following statements is NOT TRUE about coastal processes?
A. Beach is prone to erosion.
B. Erosion only occurs in the upland areas.
C. Wind is a contributory factor to storm surge.
D. Ocean waves cause water to move in the seashore.
6. Which of the following is NOT a coastal hazard?
A. landslide
B. submersion
C. coastal erosion
D. saltwater intrusion
7. What is described as an induced flow of seawater into freshwater aquifers
primarily caused by groundwater development near the coast?
A. submersion
B. storm surge
C. coastal erosion
D. saltwater intrusion
8. Which of the following is NOT an agent of coastal erosion?
A. land pollution
B. tides
321
C. storms
D. ocean waves
9. What do you call the movement of sediments from the visible portion of a
beach to the nearshore region of the coast?
A. tides
B. submersion
C. coastal erosion
D. saltwater intrusion
10. Which of the following coastal processes may cause hazards in the marine
environment?
A. tides
B. waves
C. crustal movement
D. all of the above
11. What do you call the scientific study of the chemical, biological and physical
properties of ocean water?
A. Biology
B. Chemistry
C. Physics
D. Oceanography
12. Where can we usually find aquifers?
A. underground
B. on the top of the mountain
C. top surface of the rivers
D. in the ocean waves
13. What two ions compose mainly the seawater?
A. hydrogen and potassium
B. hydrogen and oxygen
C. sodium and chlorine
D. nitrogen and phosphorus
14. Which system is broader?
A. marine system
B. coastal system
C. both A and B
D. neither A nor B
15. As a student, what ways can you do to help adapt and mitigate coastal
hazards?
A. Educate yourself.
B. Participate in local disaster preparedness program.
C. Promote the programs of the community.
D. All of the above
322
Additional Activities
Directions. Read the article below from the Philippine Star in relation to the effects
of marine and coastal processes.
A. Coastal Erosion
MGB: Coastal erosion caused Zambales beach collapse
by Rhodina Villanueva (The Philippine Star) - July 2, 2013 - 12:00am
MANILA, Philippines - The Mines and Geosciences Bureau (MGB) yesterday
said that the collapse of the coastline of a beach resort in Candelaria,
Zambales does not constitute a sinkhole phenomenon but was a result of
coastal erosion. MGB Director Leo Jasareno said they are recommending that
the area be declared permanently as a no swimming and danger zone as well.
Jasareno said with the use of ground penetrating radar (GPR)
equipment, a team of geologists who conducted an investigation found no
voids or cavities, or even a sinkhole in the affected area. What was identified
were alternating layers of loose and fine to coarse sand 18.5 meters below the
surface, he said. The equipment functions like an X-ray that can check land
sinking up to 100 meters or 300 feet below.
The beach slump is not due to sinkhole but is a result of coastal erosion
caused by wave and tidal currents. Waves undercut the base of the shoreface,
which happened during the interface of low tide and high tide, with the
prevailing southwest monsoon, the MGB report said. Jasareno noted that the
area is underlain by unconsolidated beach sand that is unstable and easily
reworked by waves.
The coastal sedimentation dynamics is indicated by the advance and
retreat of the shoreline, and that the area is also prone to storm surge hazard,
he said. He said coastal erosion is a natural phenomenon leading to the
formation of a cliff 100 meters from the shoreline. The depth of the cliff or the
steep slope from the shoreline is about 25 to 30 meters. The MGB
recommended continuous monitoring of the area for large-scale erosion and
storm surge, particularly when there is an incoming weather disturbance.
A danger zone should be declared as the area is highly prone to coastal
erosion, he added. The MGB estimated the danger zone to be 100 kilometers
long and the width to be 20 to 30 meters.
Answer the following questions based on the article you have read.
1. What is the article all about?
2. How did the MGB define coastal erosion?
3. What is the recommendation of the MGB about the issue?
323
B. Saltwater Intrusion
Saltwater Intrusion Threatening Potable Water Supplies in Philippines
21 Jun 2010 - 20:58 by OOSKAnews Correspondent
MANILA, PHILIPPINES
Some 19 areas within the Philippines are facing contamination due to
saltwater intrusion, as many continue to extract water from the nation's
aquifers, according to the Philippine Sanitation Alliance (PSA) Elisea Gozun,
former Environment Secretary and current president of PSA and member of
Earth Day Network Philippines, presented the findings based on government
data on June 17.
"This is an irreversible process," Business Mirror quoted Gozun as
saying. More than half, or some 58 percent, of groundwater that is to be
used for potable supplies "is contaminated and needs treatment," she added.
Also, saltwater intrusion is affecting one of the nation's last remaining
potable water supply sources: rivers. Forty-nine percent of the river systems
classified for drinking water do not meet pollution standards.
The PSA expected Pasig-Laguna, Pampanga, Agno, Bicol, Cagayan,
Western Visayas and Cebu to be adversely affected by 2025.
The economic costs of the pollution is thought to exceed $ 1.7 billion USD
each year, with health costs from improper sanitation making up the lion's
share at $1.2 billion USD, followed by water costs like domestic use and fish
production at $391 million USD.
Gozun stressed that the loss of life was even more costly. She said 55
Filipinos die every day from diseases related to poor sanitation and more
than 11,338 Filipinos die each year from diarrhea.
"Improving sanitation is the key to achieving most of the Millennium
Development Goals," Gozun said.
The PSA made both large-scale and small-scale suggestions for
elevating the profile of the problem, including investment in wastewater
management, rainwater harvesting, water reuse, repairing leaky household
systems and using a cup of water to brush one's teeth.
Meanwhile, Senator Edgardo J. Angara urged increased investment in water
management and wastewater treatment.
"Climate change, urbanization and the need to feed a growing
population have put a strain on our finite water resources, and there is an
urgent need to address the dangers they pose to the health of our people
and the sustainability of our environment. More often than not, water
sanitation and sewerage systems in the country is overlooked and neglected.
We need to pour more resources into it," the Philippine Information Agency
quoted Angara as saying.
"The acute seasonal problem of lack of access to potable water has
large economic costs, as well as profound impact on the quality of life. Poor
water quality affects our citizens' health, lost agricultural production,
threatens food security, and a host of other damaging consequences," he
added.
Answer the following questions based on the article you have read.
1. What is the article all about?
2. How will you relate coastal hazards to water crisis in the Philippines?
324
325
1. D
2. A
3. C
4. C
5. B
6. A
7. D
8. A
9. B
10.D
11.D
12.A
13.C
14.A
15.D
What's In
1.
2.
3.
4.
Tides
Waves
Sea level rise
Crustal
movement
5. Storm surge
What's More
There are varied
answers.
Assessment
1. D
2. C
3. D
4. C
5. D
6. C
7. A
8. C
9. C
10.B
11.C
12.C
13.C
14.B
15.B
Answer Key
What I Know
References
Books and Journals
A. Mukhopadhyay, R. Dasgupta, S. Hazra, D. Mitra. 2012. Coastal Hazards and
Vulnerability: A Review. International Journal of Geology, Earth and
Environmental Sciences. 2(1). pp. 57-69.
Millennium Ecosystem Assessment. 2005. Ecosystems and Human Well-Being:
Synthesis. Washington, DC: Island Press.
Websites
https://www.philstar.com/nation/2013/07/02/960479/mgb-coastal-erosioncaused-zambales-beach-collapse#y7lBoIebBQxOyi5H.99
https://www.ooskanews.com/southern-eastern-asia/saltwater-intrusionthreatening-potable-water-supplies-philippines
326
Earth and Life Science
Mitigation to Coastal Processes
and Hazards
Earth and Life Science – Senior High School
Mitigation to Coastal Processes and Hazards
First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of
such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are
owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials
from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writer:
Arrah G. Sulit
Editors:
Erwin R. Abrencillo, Jocelyn M. Manset
Reviewers:
Dominic P. Almirez, Franz Kevin Manalo, Princess Paolah L. De Guzman, Marissa C. Betchaida,
Louie L. Alvarez, Gregorio M. De Chavez, Jr., Jocelyn M. Manset, Mario B. Maramot,
Elaine T. Balaogan, Job S. Zape Jr.
Illustrator:
Ednelinda Robles, Cherry Amor Laroza, Lovely Joy La Rosa, Charles Erick A. Jusay, Sandro Carlo B. Tablizo
Layout Artist:
Elizalde L. Piol, Anselma M. Ebero, Jocelyn M. Manset
Management Team:
Wilfredo E. Cabral, Jocelyn M. Manset, Job S. Zape Jr., Elaine T. Balaogan, Merthel M. Evardome
Nadine C. Celindro, Nicolas M. Burgos, Mario B. Maramot, Fe M. Ong-ongowan, Rosalinda A. Mendoza
Department of Education – Region IV-A CALABARZON
Office Address:
Telefax:
E-mail Address:
Gate 2 Karangalan Village, Barangay San Isidro
Cainta, Rizal 1800
02-8682-5773/8684-4914/8647-7487
[email protected]
327
Week
8
What I Need to Know
This module was designed and written with you in mind. It is here to help you master
the nature of Earth and Life Science. The scope of this module permits it to be used
in many different learning situations. The language used recognizes the diverse
vocabulary level of students. The lessons are arranged to follow the standard
sequence of the course. But the order in which you read them can be changed to
correspond with the textbook you are now using.
The module covers:
Lesson 1 – Mitigation to Coastal Processes and Hazards
After going through this module, you are expected to:
1. identify the different impacts of human activities to coastal processes;
2. define mitigation to coastal hazards development; and
3. enumerate different ways to prevent or mitigate the impact of land, waste
disposal and construction of structures on coastal processes.
What I Know
Directions. Read the following questions and choose the letter of the correct answer.
Write the chosen letter on a separate sheet of paper.
1. Which of the following is NOT a reason for human population to choose coastal
zones as settling grounds?
A. fertile agricultural land
B. abundant marine resources
C. peaceful and safe residential area
D. great possibility for trade and transport
2. What refers to the action taken to eliminate or reduce the long-term risks and
hazards in the coastal area?
A. alteration
B. mitigation
C. renovation
D. restoration
328
3. What are the two processes interacting in a highly dynamic natural systems
of coastlines?
A. chemical and physical processes
B. endogenic and exogenic processes
C. oceanic and continental processes
D. atmospheric and geologic processes
4. Which of the following activities in coastal areas DOES NOT trigger hazard to
the natural balance of coastal system?
A. allowed number of tourists
B. construction of houses
C. development of hotels
D. prohibition of mining
5. Which of the following is NOT a result of a geologically active zone on Earth
coastal system?
A. erosion
B. salt intrusion
C. sea-level change
D. water nourishment
6. What refers to a climate change phenomenon through which ocean water
volume increases, ice sheets and glaciers melt, and thermal expansion occurs?
A. erosion
B. salt intrusion
C. sea-level change
D. water nourishment
7. What do you call the movement of saline water to fresh water aquifers which
can lead to the degradation or contamination of ground water including
drinking water resources?
A. erosion
B. salt intrusion
C. sea-level change
D. dewatering of beach
8. Which of the following is an impact of mining activities to coastal processes?
A. deposition
B. ice melting
C. reforestation
D. surface run-off
329
9. Which of the following is the BEST method to avoid erosion?
A. break water construction
B. controlling land development
C. improving waste management
D. maintaining plant cover or vegetation
10. Which of the following processes is described as pumping out water from the
shores to prevent erosion?
A. beach dewatering
B. beach nourishment
C. breakwater construction
D. installation of sand bags
11. Which method are you going to use when there is a need to add a large
amount of sand to the coast?
A. beach dewatering
B. beach nourishment
C. breakwater construction
D. installation of sand bags
12. What will you construct to prevent the further advancement of saltwater if
already present in the coastal areas?
A. sand bags
B. breakwater
C. beach hotels
D. beach houses
13. Which of the following DOES NOT ensure effective management of saltwater
intrusion cases?
A. construction of seawalls
B. monitoring of coastal activities
C. assessment of coastal areas regularly
D. regulation of human activities along coastal zone
14. One of your classmates is living in a coastal area of the community. You found
out that this coastal area is already polluted. What activity can you suggest to
mitigate the said problem?
A. acoustic concert
B. coastal clean-up drive
C. population control campaign
D. recollection and reflection among the community
330
15. Your school is located in a coastal area. You notice that waves are already
damaging the shore near the fence of the school especially during high tide
and monsoon seasons. What can be constructed to mitigate the said problem
of the school?
A. sand bag barriers
B. beach dewatering
C. breakwater
D. sea wall
Lesson 1
Mitigation to Coastal Processes and
Hazards
Coastal areas have been attractive settling grounds for human population as they
provide abundant marine resources, fertile agricultural land and possibilities for
trade and transport. This has led to high population densities and high levels of
development in many coastal areas and this trend is continuing into the 21st
century. At present, about 1.2 billion people live in coastal areas globally, and this
number is predicted to increase to 1.8–5.2 billion by the 2080s due to a combination
of population growth and coastal migration. Along with this increase follows major
investments in infrastructure and the build environment.
The characteristics of coastal environments, however, pose some great challenges to
human habitation. Coastlines are highly dynamic natural systems that interact with
terrestrial, marine and atmospheric processes and undergo continuous change in
response to these processes. Over the years, human society has often failed to
recognize the hazards related to these dynamics and this has led to major disasters
and societal disruption to various degrees. Even today, coastal development is often
taking place with little regard to the hazards present in these environments, although
climate change is likely to increase the general hazard levels. Societal activities in
coastal areas can also pose a hazard to the natural balance of coastal systems,
thereby disrupting e.g. sensitive ecosystems and subsequently human livelihood.
331
Figure 1. Breakwaters
What’s In
Activity 1: Read to Fill-out!
Directions. Read the article about coastal processes. Then, fill in the given table
below with the corresponding information needed.
According to the Department of Environment and Natural Resources, coastal
ecosystems of the Philippines are very productive and represent the huge amount of
natural resources. It provides food and livelihood to many people. However, it is also
the most geologically active zone on Earth. Coastal processes in this zone may result
to erosion, submersion and saltwater intrusion. These effects could lead to different
hazards such as:
1. Barrier islands movement.
Barrier islands are formed due to deposition of sand brought by waves
protecting the mainland from damage due to large waves. It also provides
habitat for the aquatic wildlife. It can be destroyed or moved by erosion on the
contrary.
2. Flooding
It also destroys habitat and may lead to great erosion. The main cause
of this hazard is the submersion or sea level rise, a climate change
332
phenomenon through which ocean water volume increases, ice sheets and
glaciers melt, and occurrence of thermal expansion.
3. Fresh water contamination
Intrusion or movement of saline water to fresh water aquifers can lead
to the degradation or contamination of ground water including drinking
water resources. Intrusion is aided by hydraulic action but triggered by
human activities.
Table 1. Coastal processes, causes and effects of different hazards
RESPONSIBLE
HAZARD
COASTAL
CAUSES
PROCESSES
Barrier island
movement
Loss of Wildlife
Habitat
Waves
Flooding
Fresh water
contamination
EFFECTS
Climate Change
Sea level change
Salt water
intrusion
What’s New
Activity 2: Break it Out!
Directions. Take a look at the given pictures. Then, answer the guide questions.
Figure 3. Breakwaters
Figure 2. Sea walls
333
Guide Questions:
1. What can you say about the pictures?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
2. Explain how these ways help in preventing coastal hazards?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
What is It
Activity 3: Root Mapping
Coastal hazard-prone areas in the Philippine local government units in areas
that are ranked extremely high in susceptibility to landslide and flooding are advised
to immediately relocate the residents of these zones to safer areas. Especially during
typhoons that can cause coastal hazards. Though naturally occurring, there are
human activities that can affect coastal processes that may lead to hazards.
With this, mitigation methods in the coastal zones for protection are enhanced
in these areas. Mitigation refers to action taken to eliminate or reduce the long-term
risks and hazards,
334
Directions. Complete the following concept map by identifying the impacts and
mitigation method appropriate in the given human activities.
Mitigation to Human Activities’ Impact to the Coastal Processes
Home Activity
Definition
Water Disposal
Construction of
Structures
Land
Development
Dumping Waste
Building
structures
(Houses, hotel,
etc.)
Altering
landscape to
agriculture or
residential
Impact
Mitigation
Method
335
Options for Impacts:
Increased erosion
Increased sediments run-off
Sea level rise
Change natural drainage patterns
Enhanced salt intrusion
Options for Mitigation Methods:
Maintaining plant cover – This can result to improved vegetation
Monitoring and assessment - It ensures effective management of
saltwater intrusion cases.
Regulation of Laws
Artificial recharge – It pumps freshwater to the reservoir to prevent
saltwater from intruding through the coasts
Engineering structures.
Jetties – It prevent coastal erosion by promoting beach build-up as they
trap sand
Prepare and emergency survival kit
Create an evacuation plan.
Know where the evacuation center is and how to get there.
Listen to news from any means.
Options for Mitigation Methods:
Seawalls - These are used to counteract waves that hit the shores. These
are offshore structures that protect coasts from parallel waves.
Groins / Stone barriers – It intercepts the steady flow of sand keeps the
particular sand from eroding.
Breakwaters – It can be constructed along coasts to prevent further
advancement of saltwater if already present
Beach nourishment – It is a method where a large amount of sand is
added to the coasts.
Installation of small walls or sandbags – These are used to counteract
waves that hit the shores.
Beach dewatering – It involves pumping out water from the shores to
prevent erosion.
Construction of buildings in a safe distance from the water
Ban of mining activities – This can cause decrease in pollutants
336
According to the Department of Environment and Natural Resources, coastal
ecosystems of the Philippines are very productive and represent the huge amount of
natural resources. It provides food and livelihood to many people. It is also the most
famous tourist destinations in the archipelago. Thus, there are many business men
who made expeditious development in coastal zones. Along with these are the land
development and number of construction sites near the zone However, it is also the
most geologically active zone on Earth. Coastal processes in this zone may result to
erosion, submersion and saltwater intrusion.
Erosion as discussed from
the previous module is brought by
processes like waves and tides.
During intense storms and tidal
waves, most coastal erosion
occurs. It may cause damages on
properties, and affect human
habitation and tourist activities.
They put structures like seawalls
to avoid that. These are used to
counteract waves that hit the
Figure 4. Sea walls
shores.
These
are
offshore
structures that protect coasts from parallel waves. Groins / Stone barriers that
intercepts the steady flow of sand are also built to keep sands from eroding.
Breakwaters can also be constructed along coasts to prevent further advancement of
saltwater if already present. Though these structures avoid erosion it has
disadvantages, too. It prevents natural deposition of sands. They absorb wave energy
but permanently destroy sand grasses and dunes. Eventually, it will destroy marine
habitat.
Aside from concrete structures, there are also practices that can disturb and totally
destroy the natural coastal process.
Beach nourishment is commonly done by adding sand to the shore to extend
their houses, hotels and other structures. Likely, beach dewatering is another
method to avoid erosion. It
involves pumping out water from
the
shores.
However,
these
practices may lead to saltwater
intrusion or movement of saline
water into freshwater aquifers. It
will result to groundwater quality
degradation.
Groundwater
includes drinking water.
Figure 5. Breakwaters
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Global Warming and Coastal processes
Crustal movements and sea level change are coastal processes and its
interactions affect the climate. They are part of tight interconnected Earth system
that affects both global and regional climates. On the other hand, climate change
also affects these processes.
We are very familiar with the enhanced global warming. It gives a lot of
consequences even if it is just a few degrees increased than the usual average
temperature. Global warming results to intense storms, flooding, droughts and
extreme storm. High temperature resulted to ice melting. Consequently, sea level
rises affecting the people throughout the world.
What are the different causes of climate change?
Activity 4: We Can!
Directions. Observe your community. Identify the different practices and activities
that cause and triggers global warming.
Practices/
Activities of the
Community
Causes
of Global
Warming
My Practices/
Activities
My Community
What can I do?
What can we do?
338
What’s More
Activity 5: Making an Action Plan
Directions. Suppose you are the coordinator of the Municipal Disaster Risk
Reduction Management of your town. You are tasked to make an action plan to
mitigate the effects of coastal processes in risk zone. The action plan template is
already given below. Remember that the environmental and people health are your
priorities. Then, kindly answer the guide questions.
Table 2. Action plan for mitigation of coastal processes and hazards
Project
Activity
Resources
Needed
Persons
Involved
Duration
Action
Taken
Remarks
Preparation
of action
plans, and
emergency
response
teams
The
participants
gained
knowledge
and skills
on coastal
mitigation
through
action
plans
Resource
Speaker
Project
READY!
Resilience
Enhancem
ent Amidst
Disaster
-Youth
Empower
ment
Objectives
Conduct of
Symposia
and
Awareness
Campaign
To inform
and
empower
residents
on coastal
hazards
and
mitigation
Residents
Venue
Barangay
Officials
Sound
System
Committee
Projector
Learning
kits
339
2 months
Guide Questions:
1. What are the factors did you consider to make projects and activities?
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
2. Are all your objectives measurable and attainable? Justify your answer.
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
3. What are the difficulties/problem did you encounter in making the action
plan?
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
4. How did you cope up with the problem encountered in making the action
plan?
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
340
What I Have Learned
Directions: Read the following statements and fill in the blanks with the correct
answer. Choose from the pool of words given below.
1. _____________ have been attractive settling grounds for human population
as they provide abundant marine resources, fertile agricultural land and
possibilities for trade and transport.
2. _____________ refers to action taken to eliminate or reduce the long-term
risks and hazards in the coastal area.
3. Coastlines are highly dynamic natural systems that interact with
___________, _____________, and _______________ processes and undergo
continuous change in response to these processes.
4. ________________activities in coastal areas can also trigger hazard to the
natural balance of coastal systems, thus disrupting e.g. sensitive
ecosystems and subsequently human livelihood.
5. As the most geologically active zone on Earth coastal processes zone may
result to _____________, ___________, and ____________.
6. ________________ is a climate change phenomenon through which ocean
water volume increases, ice sheets and glaciers melt, and thermal expansion
occurs.
7. ________________ movement of saline water to fresh water aquifers which can
lead to the degradation or contamination of ground water including drinking
water resources.
8. ________________is a mitigation method where a large amount of sand is
added to the coasts
9. __________________ involves pumping out water from the shores to prevent
erosion.
10. ___________________ or total prohibition of mining activities avoid pollution
and sediments run-off.
WORD POOL
coastal area
salt intrusion
erosion
mitigation
beach nourishment
adaptation
submersion
atmospheric
sea-level rise
terrestrial
putting sand bag
marine
beach dewatering
human
ban of mining
341
What I Can Do
Activity 6: Researcher’s Problem
Directions. Suppose you are one of the leading researchers in your coastal
community. A land developer wants to build a mall that is 20 feet off the edge of the
coast. He presented that his mall will not be affected by coastal processes because
there were no records of any major damages done in your community. As a
researcher, what are the problems that the land developer might encounter if he
would continue to build his mall? Answer the question in the form of a letter.
342
Assessment
Directions. Read the following questions and choose the letter of the correct answer.
Write the chosen letter on a separate sheet of paper.
1. Which of the following activities in coastal areas can trigger hazard to the
natural balance of coastal system?
A.
B.
C.
D.
allowed number of tourists
construction of breakwater
enhancing vegetation
prohibition of mining
2. Which of the following is/are natural result/s of a geologically active zone on
Earth coastal system?
A.
B.
C.
D.
breakwater
sand erosion
sandbags and stone barriers
seawalls and island barriers
3. What refers to a climate change phenomenon through which ocean water
volume increases, ice sheets and glaciers melt, and thermal expansion occurs?
A.
B.
C.
D.
erosion
salt intrusion
sea-level change
water nourishment
4. Which of the following is the BEST reason for human population to choose
coastal zones as settling grounds?
A.
B.
C.
D.
abundant marine resources
peaceful and safe residential area
small possibility for trade and transport
unfertile agricultural land
5. What refers to the action taken to eliminate or reduce the long-term risks and
hazards in the coastal area?
A.
B.
C.
D.
alteration
mitigation
renovation
restoration
343
6. Salt intrusion is the movement of saline water to fresh water aquifers which
can lead to the following EXCEPT
A.
B.
C.
D.
loss of vegetation
erosion to low land area
contamination of ground water
shortage in drinking water supply
7. What are the two processes interacting in a highly dynamic natural systems
of coastlines?
A.
B.
C.
D.
chemical and physical
endogenic and exogenic
oceanic and continental
atmospheric and biosphere
8. The following activities promote erosion EXCEPT
A.
B.
C.
D.
break water construction
land development
mining activities
waste disposal
9. Which of the following is NOT an impact of mining activities to coastal
processes?
A.
B.
C.
D.
enhanced erosional activities
improved biodiversity
loss of vegetation
surface run-off
10. Which of the following structures are built to counteract waves that hit the
shores?
A. barrier
B. groins
C. jetties
D. seawalls
11. Which of the following DOES NOT ensure effective management of saltwater
intrusion cases?
A. construction of seawalls
B. monitoring of coastal activities
C. assessment of coastal areas regularly.
D. regulation of human activities along coastal zone.
344
12. Which method are you going to use when there is a need to add a large
amount of sand to the coast?
A. beach promotion
B. beach nourishment
C. sand bag installation
D. seawalls construction
13. One of your classmates is living in a coastal area of the community. You found
out that this coastal area is already polluted. What activity can you suggest to
mitigate the said problem?
A.
B.
C.
D.
acoustic concert
coastal clean-up drive
population control campaign
recollection and reflection among the community
14. Your house is located in a coastal area. You notice that waves are already
damaging the shore near the fence of the house especially during high tide
and monsoon seasons. What can be constructed to mitigate the said problem
of your house?
A.
B.
C.
D.
artificial water recharge
beach dewatering
breakwater
sea wall
15. What will you construct to prevent the further advancement of saltwater if
already present in the coastal areas?
A. beach nourishment
B. beach dewatering
C. breakwaters
D. sand bags
345
Additional Activities
Directions. Choose one from the given the activities. Do the tasks given adhering to
the theme: “Benefits and Costs of Coastal Sustainable Development.”
1.
2.
3.
4.
Write a 1000-word essay.
Make a poster-collage using recyclable materials.
Create a jingle.
Create a two-minute infomercial.
Table 3. Rubrics for the activities
Activity
Essay
Poster-collage
Jingle
Infomercial
Content
Accurate and
wellorganized
Organized
with minimal
error
Not organize
and with
errors
Accurate and
wellorganized
Organized
with minimal
error
Not organize
and with
errors
Grammar/
Creativity
Exemplar grammar
With 1-5 grammatical
errors
With five or more
grammatical errors
Exemplar creativity and
resourcefulness
With creativity within
the standard
Lacking of creativity
and resourcefulness
346
Timeliness
Submitted on or
before the
deadline
Submitted onetwo days after
the deadline
Submitted a
week after the
deadline
Submitted on or
before the
deadline
Submitted onetwo days after
the deadline
Submitted a
week after the
deadline
Points
10
7
5 and
below
10
7
5 and
below
347
What Can I Do
What I Know
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
C
B
C
D
D
C
B
D
D
A
B
B
A
B
D
What's in
Activity 1
Answers may vary
What's New
Activity 2
What is It
Activity 5
Activity 3
Answer may vary
Impact
1. Sea level rise
2. Erosion,Intrusion,ch
anged in drainage
pattern
3. Changed in drainage
patterns,increased
erosion
Mitigation
Answers may vary
What I have Learn?
1. Coastal area
2. Mitigation
3. Terrestrial, marine,
atmospheric
4. Human
5. Erosion, submersion, salt
water intrusion
6. Submersion
7. Salt water intrusion
8. Sand bag barriers
9. Beach dewatering
10. Ban
Assessment
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
A
B
C
A
B
B
C
A
B
D
A
B
B
D
C
Answer may vary
Answer Key
References
Book
G.R.Thompson and J. Turk, Introduction to Earth Science,(Philippines:
cengage Learning 2012) 347
Websites
Department of Environment and Natural Resources, and et.al Managing
Impacts of Development in Coastal Zone,(Philippines: Coastal Management Project of
Department
of
Environment
and
Natural
Resources,
2001)https://faspselib.denr.gov.ph
A. Kotsoni, D. Dimelli and L, Ragia. Land Use Planning for Sustainable
Development
of
Coastal
Regions
(Greece:2017)
https://www.researchgate.net/publication/316867706
M. Pawlukiewicz, P. Gupta, and C. Koelbel. Ten Principles for Coastal
Development. Washington, D.C.: ULI–the Urban Land Institute, 2007.
https://uli.org>uploads>
https://www.encyclopedia.com/ Access: February 23, 2019
348
For inquiries or feedback, please write or call:
Department of Education - Bureau of Learning Resources (DepEd-BLR)
Ground Floor, Bonifacio Bldg., DepEd Complex
Meralco Avenue, Pasig City, Philippines 1600
Telefax: (632) 8634-1072; 8634-1054; 8631-4985
Email Address:
[email protected] *
[email protected]
349