Senior High School
Earth and Life
Science
Quarter 1 – Module 1
Planet Earth – Our Unique Home
Earth and Life Science – Senior High School
Alternative Delivery Mode
Quarter 1 – Module 1: Planet Earth - Our Unique Home
Second Edition, 2021
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Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Compiler/Writer: Maria Rosandee F. Tabada
Content Editors/Reviewers:
Ms. Celia C. Gepitulan, Principal I, Regino Mercado Night High School
Mrs. Jocelyn C. Butanas, Master Teacher I, Talamban National High School
Mr. Bonnie James A. Saclolo, Teacher III, Cebu City National Science High School
Dr. Rey A. Kimilat, Head Teacher V, Abellana National School
Language Editor:
Mrs. Roquesa B. Sabejon, PSDS-ND7
Management Team:
Chairperson: Dr. Rhea Mar A. Angtud, Schools Division Superintendent
Dr. Bernadette A. Susvilla, Asst. Schools Division Superintendent
Mrs. Grecia F. Bataluna, CID Chief
Mrs. Vanessa L. Harayo, EPS-LRMS
Dr. Raylene S. Manawatao, EPS-Science
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Senior High School
Earth and Life
Science
Quarter 1 – Module 1
Planet Earth - Our Unique Home
For the learner:
Welcome to the SHS Earth and Life Science Alternative Delivery Mode (ADM)
Module on Planet Earth - Our Unique Home!
The hand is one of the most symbolized part of the human body. It is often used to
depict skill, action and purpose. Through our hands we may learn, create and
accomplish. Hence, the hand in this learning resource signifies that you as a learner
is 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 at your own pace and time. You will be enabled to
process the contents of the learning resource while being an active learner.
This module has the following parts and corresponding icons:
This will give you an idea of the skills or
What I Need to Know
competencies you are expected to learn in the
module.
This part includes an activity that aims to
What I Know
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.
This is a brief drill or review to help you link
What’s In
the current lesson with the previous one.
What’s New
What Is It
What’s More
What I Have Learned
What I Can Do
Assessment
Additional Activities
Answer Key
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.
This section provides a brief discussion of the
lesson. This aims to help you discover and
understand new concepts and skills.
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.
This
includes
questions
or
blank
sentence/paragraph to be filled in to process
what you learned from the lesson.
This section provides an activity which will
help you transfer your new knowledge or skill
into real life situations or concerns.
This is a task which aims to evaluate your
level of mastery in achieving the learning
competency.
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.
This contains answers to all activities in the
module.
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At the end of this module you will also find:
References
This is a list of all sources used in developing
this module.
The following are some reminders in using this module:
1. Use the module with care. Do not put unnecessary mark/s on any part of the
module. Use a separate sheet of paper in answering the exercises.
2. Don’t forget to answer What I Know before moving on to the other activities
included in the module.
3. Read the instruction carefully before doing each task.
4. Observe honesty and integrity in doing the tasks and checking your answers.
5. Finish the task at hand before proceeding to the next.
6. Return this module to your teacher/facilitator once you are through with it.
If you encounter any difficulty in answering the tasks in this module, do not
hesitate to consult your teacher or facilitator. Always bear in mind that you are not
alone.
We hope that through this material, you will experience meaningful learning and
gain deep understanding of the relevant competencies. You can do it!
What I Need to Know
This module was designed and written with you in mind to help you master
the life-sustaining characteristics of our planet, Earth. The scope of this module
permits it to be used in many different learning situations. The language used
recognizes the diverse vocabulary level. The lessons are arranged to follow the
standard sequence of the course.
The module is divided into two lessons, namely:
• Lesson 1 – LIFE-SUSTAINING PROPERTIES OF PLANET EARTH
• Lesson 2 – THE EARTH’S SUBSYSTEMS
Content Standard:
The learners demonstrate an understanding of the subsystems (geosphere,
hydrosphere, atmosphere, and biosphere) that make up the Earth.
Performance Standard:
The learners shall be able to conduct a survey to assess the possible geologic/
hydrometeorological hazards that your community may experience.
After going through this module, you are expected to:
1. recognize the uniqueness of Earth, being the only planet in the solar system
with properties necessary to support life (S11/12ES-Ia-e-3) and
2. explain that the Earth consists of four subsystems, across whose boundaries
matter and energy flow (S11/12ES-Ia-e-4).
5
What I Know
DIRECTIONS: Write the letter of your answer on a separate sheet.
1.
What subsystem protect us from the sun’s harmful radiation?
A. atmosphere
B. biosphere
C. geosphere
D. hydrosphere
2. What makes up the hydrosphere?
A. carbon
B. magma
C. mercury
D. water
3. Which subsystem provides the gases needed to sustain life on Earth?
A. atmosphere
B. biosphere
C. geosphere
D. hydrosphere
4. What subsystem includes all life forms?
A. atmosphere
B. biosphere
C. geosphere
D. hydrosphere
5. What flows in all the subsystems when they interact?
A. force and power
C. mass and volume
B. matter and energy
D. velocity and acceleration
6. Which Earth subsystems interact when plants absorb minerals from the soil?
A. biosphere and geosphere
C. geosphere and hydrosphere
B. atmosphere and biosphere
D. atmosphere and hydrosphere
7. When strong winds create big waves, which Earth subsystems interact?
A. atmosphere and biosphere
C. hydrosphere and geosphere
B. biosphere and hydrosphere
D. atmosphere and hydrosphere
8. Which of the following subsystems interact when animals drink water from a
pond, lake, or river?
A. geosphere and biosphere
C. biosphere and hydrosphere
B. atmosphere and biosphere
D. hydrosphere and atmosphere
9. When an earthquake causes tsunami, which Earth subsystems are involved?
A. atmosphere and biosphere
C. biosphere and hydrosphere
B. atmosphere and geosphere
D. geosphere and hydrosphere
10. Which characteristic enables the Earth to support life? It has _____________.
A. electricity
C. one moon only
B. polar ice caps
D. energy-rich chemicals
11. Which of the following describes a characteristic that scientists consider
important for a planet to support life?
A. number of moons
B. presence of impact craters
C. availability of plutonium, thorium, and uranium
D. presence of chemicals that can form biomolecules
12. What are some mechanisms found on Earth that help distribute nutrients?
A. friction, radioactivity, sound
C. internet connection, transportation
B. medical personnel and hospitals D. atmosphere, water cycle, volcanic activity
13. Which of the following statements about Earth is FALSE?
A. It is a terrestrial planet.
B. It is found at a right distance from the sun.
C. Its atmosphere provides significant shielding.
D. Gases found in the atmosphere are all greenhouse gases.
6
14. What is one reason that life cannot survive in Mercury?
A. It has no moon.
B. It is too hot during the day and too cold at night.
C. It has a solid, cratered surface, much like the Earth's moon.
D. Mercury makes a complete orbit around the Sun in just 88 Earth days.
15. Which statement is NOT a reason why Uranus and Neptune cannot support life?
These planets ______________________.
A. contain oxygen gas
B. get minimal light energy from the sun
C. are made up of a thick soup of “icy" materials
D. have an atmosphere made up of hydrogen and helium
Lesson LIFE-SUSTAINING PROPERTIES
1
OF PLANET EARTH
Our solar system is located in an outer spiral arm of the Milky Way galaxy. It
consists of our star, the Sun, and everything bound to it by gravity — the planets
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, dwarf planets
such as Pluto, dozens of moons and millions of asteroids, comets and meteoroids.
Mercury is a terrestrial (rocky) planet. It has a solid, cratered surface, much
like the Earth's moon. It has a thin atmosphere, or exosphere, is composed mostly
of oxygen, sodium, hydrogen, helium, and potassium. Venus has a solid surface
covered with extensive plains featuring high volcanic mountains and vast ridged
plateaus. The planet’s surface temperature is hot enough to melt lead. Earth is a
rocky planet with a solid and dynamic surface of mountains, canyons, plains and
more. Most of our planet is covered in water. The atmosphere is a perfect balance
for us to breathe and live. Mars is a rocky planet. Its surface has been altered by
volcanoes, impacts, winds, crustal movement, and chemical reactions. It has a thin
atmosphere made up of a small amount of oxygen and water vapor. Jupiter is the
biggest planet in our solar system. It is made of gas so lacks an Earth-like surface.
Its atmosphere is made up mostly of hydrogen and helium. Saturn’s is a gas-giant
planet and therefore does not have a solid surface like Earth’s. But it might have a
solid core somewhere in there. Uranus and Neptune are both made up of a thick
soup of “icy" materials – water, methane, and ammonia – above a small rocky core.
Their atmospheres are made mostly of molecular hydrogen and atomic helium, with
a small amount of methane.
7
What’s In
DIRECTIONS: Complete the crossword by filling in name of the planet that fits each
clue. Write answers on a separate sheet.
Across:
1. the planet closest to the
sun
4. an ice giant like
Neptune
6. mostly covered in liquid
water
7. considered Earth’s twin
Down:
2. the planet farthest from
the sun
3. biggest planet in the
solar system
5. a gas giant known for
its rings
8. known as the red planet
What’s New
EXOPLANETS
When you look at the sky on a clear night, do you ever
wonder if life exists in other parts of the universe? Do you
think every star you see hosts at least one planet?
The worlds orbiting other stars are called “exoplanets,”
and they come in a wide variety of sizes, from gas giants larger Image Credit:
Word for Microsoft 365
than Jupiter to small, rocky planets about as big around as
Earth or Mars.
More than 4,000 exoplanets have been identified since the first one, 51 Pegasi
b, was discovered in 1995. A newly discovered exoplanet, Kepler-452b, comes the
closest of any found so far to matching our Earth-sun system. However, signs of
current life outside Earth have not been detected.
8
What Is It
What makes planet Earth our home special?
What are its unique
characteristics that make it the only planet in the Solar System to support life?
TEMPERATURE AND WATER
The Earth is a “Goldilocks Planet” because it has the right
distance from the Sun to allow temperatures for liquid water to exist. It
is neither too hot nor too cold. It is also the only planet in the Solar
Image Credit:
System that contains liquid water on its surface.
Word for Microsoft 365
ATMOSPHERE
The Earth’s atmosphere keeps the surface warm and provides
chemicals needed for life, such as nitrogen, carbon dioxide, and oxygen.
It also protects all organisms on Earth from harmful radiation and small
Image Credit:
to medium-sized meteorites.
Word for Microsoft 365
ENERGY
The Earth has a steady source of light energy and contains
energy-rich chemicals. With a steady input of either light or chemical
energy, cells can run the chemical reactions necessary for life.
Image Credit:
Word for Microsoft 365
NUTRIENTS
The Earth has mechanisms that circulate nutrients. Some of
these include the water cycle, the atmosphere, and volcanism.
Image Credit:
Word for Microsoft 365
What’s More
Activity 1
DIRECTIONS: Write True if the statement correctly describes a life-sustaining
characteristic of planet Earth and False if it does not. Use a separate sheet of paper
for your answers.
1. The temperature range of Earth’s surface allows liquid water to exist.
2. The Earth is a terrestrial planet with available nutrients.
3. The Earth receives too much sunlight.
4. The Earth’s atmosphere is very thick that makes the surface very warm.
5. Liquid water is readily available on Earth’s surface.
6. It has insufficient gravity to hold an atmosphere so gas molecules escape.
7. It contains energy-rich chemicals that helps run reactions in cells.
8. Its atmosphere protects organisms from small to medium-sized meteorites.
9. The Earth is located at a right distance from the sun.
10. Chemicals react slowly and water is frozen because of low temperatures.
9
Lesson INTERACTIONS BETWEEN EARTH’S
2
SUBSYSTEMS
Everything in Earth's system can be placed into one of four major subsystems:
land, water, living things, or air.
These four subsystems are called "spheres." Specifically, they are the
"geosphere" (land), "hydrosphere" (water), "biosphere" (living things), and
"atmosphere" (air).
What’s In
DIRECTIONS: Identify the sphere described in each of the following statements. Use
a separate sheet of paper.
1. It is a protective blanket surrounding the earth’s surface.
2. This sphere includes all the soil, rocks, and minerals found on Earth.
3. The most abundant gas on this subsystem is nitrogen.
4. This sphere includes bodies of water, clouds, and precipitation like rain.
5. This subsystem includes animals like fish and shellfish.
What Is It
THE EARTH’S FOUR SUBSYSTEMS
Image Credit:
Word for Microsoft 365
Image Credit:
Word for Microsoft 365
Image Credit:
Word for Microsoft 365
Image Credit:
Word for Microsoft 365
GEOSPHERE
The geosphere contains several layers of land. The layers are physically
and chemically different. The topmost layer consists of loose soil rich
in nutrients, oxygen, and silicon.
HYDROSPHERE
The hydrosphere contains all the solid, liquid, and gaseous water of
the planet. Ninety-seven percent of Earth's water is salty mainly found
in seas and oceans.
BIOSPHERE
The biosphere contains all the planet's living things. This sphere
includes all the microorganisms, plants, and animals of Earth.
ATMOSPHERE
The atmosphere contains all the air in Earth's system. It is composed
of the following mix of gases in differing amounts:
• nitrogen 78%
• oxygen 21%
• argon 0.9%
• carbon dioxide, nitrous oxides, methane, and ozone (very low
amounts)
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SPHERE INTERACTIONS
Important interactions occur among the subsystems. These allow matter and
energy to flow and/or cycle so living organisms can survive.
Example No. 1: VOLCANIC ERUPTION
GEOSPHERE: eruption occurs on land
ATMOSPHERE: large amount of particulate matter is
released into the air
HYDROSPHERE: rainfall usually
increases following an eruption
(because of the released materials
from the eruption)
BIOSPHERE: some plants and
animals die (due to the released
materials from the eruption)
BIOSPHERE: rainfall stimulates
plant growth
GEOSPHERE: dead plants and
animals enrich the soil
BIOSPHERE: enriched soil stimulates
plant growth
Figure 1. Interactions as a result of a Volcanic Eruption
Example No. 2: WATER CYCLE
Water on Earth is billions of years old. However, individual water molecules
keep moving through the water cycle. The water cycle is a global cycle. It takes place
on, above, and below Earth’s surface, as shown in Figure 2 below.
Figure 2. The Water Cycle
Credit: NASA via Global Precipitation Measurement <https://gpm.nasa.gov/education/water-cycle>
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The Water Cycle moves water in all the four subsystems through the following
processes.
• Evaporation occurs when water on the surface changes to water vapor. The sun
heats the water and gives water molecules enough energy to escape into the
atmosphere.
• Sublimation occurs when ice and snow change directly to water vapor. This also
happens because of heat from the sun.
• Transpiration occurs when plants release water vapor through leaf pores called
stomata.
• Condensation is the process in which water vapor changes to tiny droplets of
liquid water. The water droplets may form clouds.
• Precipitation, such as rain, is the falling of water droplets from the clouds.
Eventually, this water evaporates again and repeats the water cycle.
Most precipitation falls into the ocean and some will end up as either surface
runoff or groundwater.
• Surface runoff is water from precipitation that flow over the surface of the
ground. It may eventually flow into a body of water.
• Groundwater is water from precipitation that soaked into the ground.
What’s More
Activity 2
A. DIRECTIONS: The following questions all refer to the Water Cycle. Write the
letter of your answer on a separate sheet.
1. Evaporation involves the movement of water to the _____________.
A. atmosphere
B. biosphere
C. geosphere
D. hydrosphere
2. Transpiration is the movement of water from the ___________ to the __________.
A. atmosphere; biosphere
C. biosphere; atmosphere
B. atmosphere; geosphere
D. hydrosphere; atmosphere
3. Most precipitation falls on oceans. In this situation, precipitation ends up on
the _______________.
A. atmosphere
B. biosphere
C. geosphere
D. hydrosphere
4. Surface runoff is water that flows on the _____________ to a body of water.
A. atmosphere
B. biosphere
C. geosphere
D. hydrosphere
5. When groundwater is used by plants, water moves from the ______ to the ______.
A. geosphere; biosphere
C. hydrosphere; biosphere
B. atmosphere; geosphere
D. atmosphere; hydrosphere
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B. DIRECTIONS: Complete the diagram. Write your answers on a separate sheet.
INTERACTIONS OF SUBSYTEMS IN PHOTOSYNTHESIS
Oxygen is released to the (5)____________.
Carbon dioxide comes
from the (1)_________.
plant
Glucose is used by the
plant and consumers in
the (4)____________.
Image Credit:
Word for Microsoft 365
Liquid water, part of the (2)____________,
is stored in the (3)____________.
What I Have Learned
DIRECTIONS: Choose your answer from the Word Bank to complete the paragraphs.
Write your answers on a separate sheet.
distance
matter
energy-rich
nitrogen
Word Bank:
gases
nutrients
land
protect
living
water
The Earth is the only planet in the solar system with the characteristics to
support life. It has the right temperature for liquid water to form because of its
(1)
from the sun. Its atmosphere is thick enough to keep the surface warm
and to (2)
from harmful radiation and meteorites. The atmosphere is also
made up of gases that support life. It gets the right amount of light energy from
the sun and has (3)
chemicals. It also has mechanisms to circulate and
replenish (4)
.
The Earth has four subsystems or spheres that allow the flow of (5)
and
energy among them. Their interactions help circulate and replenish nutrients to
sustain life.
• The geosphere includes all (6)
in the Earth’s interior. The topmost part
is made up of soil where plants grow.
• The hydrosphere is made up of all the (7)
on Earth as water vapor, liquid
water, or ice. Saltwater makes up 97% of all the water on earth.
• The biosphere is comprised of all (8)
things including microbes, plants,
and animals.
• The atmosphere is the layer of (9)
surrounding Earth. It consists of 78%
(10)
, 20.9% oxygen, 0.9% argon, and trace amounts of other gases
including carbon dioxide.
13
What I Can Do
DIRECTIONS: Read the following situations and do what is asked for each. Write
your answers on a separate sheet.
1. NASA’s Mars Exploration Program seeks to understand Mar’s past and present
characteristics and whether it is a habitable world or not.
a) Study the following table that compares data between Earth and Mars.
b) Describe three (3) similar characteristics between Mars and Earth that
scientists can explore to determine if we can live on Mars.
Atmosphere
(Composition)
Atmosphere
(Pressure)
Gravity
Largest Volcano
Length of Day
Length of Year
Polar Caps
Table 1. Mars and Earth Comparison Table
MARS
EARTH
Carbon dioxide 95.32%
Nitrogen 77%
Nitrogen 2.7%
Oxygen 21%
Argon 1.6%
Argon 1%
Oxygen 0.13%
Carbon dioxide 0.038%
Water Vapor 0.03%
Nitric Oxide 0.01%
7.5 millibars (average)
1,013 (millibars at sea level)
0.375 that of Earth
Olympus Mons
16 miles high
374 miles in diameter
24 hours, 37 minutes
687 Earth days
Covered with a mixture of
carbon dioxide ice and water ice
-63C
2.66 times that of Mars
Mauna Loa (Hawaii)
6.3 miles high
75 miles in diameter
Slightly under 24 hours
365 days
Permanently covered with
water ice
14C
Ave. Surface
Temperature
Table adapted from http://phoenix.lpl.arizona.edu/mars111.php
2. At present, we are experiencing the COVID-19 Pandemic. Observe your
surroundings and describe three (3) possible effects of this pandemic on the
subsystems.
(Example: BIOSPHERE on ATMOSPHERE – People do fewer activities
outside their homes. This will lead to lesser pollutants released to the air.)
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Assessment
DIRECTIONS: Write the letter of your answer on a separate sheet.
1.
What Earth subsystem includes the medium for growth of all kinds of
vegetation?
A. atmosphere
B. biosphere
C. geosphere
D. hydrosphere
2. Which subsystem acts as a protective umbrella around Earth?
A. atmosphere
B. biosphere
C. geosphere
D. hydrosphere
3. What subsystem includes all living organisms found in different ecosystems?
A. atmosphere
B. biosphere
C. geosphere
D. hydrosphere
4. Which pair is correct?
A. air: biosphere
C. land: atmosphere
B. life: geosphere
D. water: hydrosphere
5. What gases make up the Earth’s atmosphere?
A. hydrogen, helium, methane
C. nitrogen, oxygen, argon
B. oxygen, sodium, potassium
D. water, methane, and ammonia
6. What happens when subsystems interact? There is _____________________.
A. a cycle of force and power
C. an exchange of force and power
B. a flow of matter and energy
D. generation of matter and energy
7. When people travel on water, which Earth subsystems interact?
A. atmosphere and biosphere
C. atmosphere and geosphere
B. biosphere and hydrosphere
D. geosphere and hydrosphere
8. What subsystems are involved when an ipo-ipo (tornado) picks up dust and
stones?
A. geosphere and biosphere
C. hydrosphere and biosphere
B. geosphere and atmosphere
D. hydrosphere and atmosphere
9. Which describes a unique characteristic that enables the Earth to support life?
The Earth __________________.
A. has liquid water
C. rotates on its axis
B. has plenty of gases
D. revolves around the sun
10. How do the Earth’s atmosphere, water cycle and volcanism help sustain life?
These are means of _________________.
A. transportation
C. protection from radioactivity
B. circulating nutrients
D. shielding from harmful radiation
11. What is a Goldilocks Planet? It is a planet that _________________.
A. revolves around three stars
B. follows an irregular “curly” path
C. has the right distance from its Sun for liquid water to exist
D. has an atmosphere that can provide significant insulation and shielding
12. Which correctly describes the chemicals found on Earth?
A. It has the needed substances for the growth of organisms.
B. It has very few of the substances that provide energy to cells.
C. Nutrients are difficult to obtain because of very active flow systems.
D. The nutrients on Earth are spread so thin that they are hard to obtain.
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13. Which of the following statements about the Earth is TRUE?
A. Its surface is mostly covered in ice.
B. Its surface is either too hot or too cold.
C. Its source of light energy is unpredictable.
D. It is located at a right distance from the sun.
14. Why is Venus unable to support life?
A. It is a terrestrial planet like Earth.
B. Its atmosphere makes the surface too hot.
C. Its surface features high volcanic mountains and vast ridged plateaus.
D. It shines the brightest among the planets known to ancient astronomers.
15. Which exoplanet has a greater chance of supporting life?
A. Exoplanet A is a gas giant with a solid core.
B. Exoplanet B is a planet with mountains, canyons, and plains.
C. Exoplanet C has a steady input of chemical energy for cellular reactions.
D. Exoplanet D has a thin atmosphere with traces of oxygen and water vapor.
References
Belnay, L. (n.d.-a). TEACHER BACKGROUND: EARTH’S ATMOSPHERE. Retrieved
June 29, 2020, from Earth System Research Laboratories Global Monitoring
Laboratory website:
https://www.esrl.noaa.gov/gmd/education/info_activities/pdfs/TBI_earths_
atmosphere.pdf
Belnay, L. (n.d.-b). TEACHER BACKGROUND: EARTH’S SPHERES. Retrieved June
27, 2020, from Earth System Research Laboratories Global Monitoring
Laboratory website:
https://www.esrl.noaa.gov/gmd/education/info_activities/pdfs/TBI_earth_s
pheres.pdf
Brennan, P. (2017, August 7). Finding Another Earth (T. Greicius, Ed.). Retrieved
June 27, 2020, from NASA website: https://www.nasa.gov/jpl/findinganother-earth
Brennan, P. (2018, April 21). What in the World is an ‘Exoplanet?’ Retrieved from
NASA website: https://www.nasa.gov/feature/jpl/what-in-the-world-is-anexoplanet
CK-12. (2020). CK-12 Biology for High School. Retrieved from
https://flexbooks.ck12.org/cbook/ck-12-biology-flexbook2.0/section/6.5/primary/lesson/water-cycle-bio
Earth, our Goldilocks Planet Dataset | Science On a Sphere. (n.d.). Retrieved from
sos.noaa.gov website: https://sos.noaa.gov/datasets/earth-our-goldilocksplanet
Our Solar System. (2019, October 7). Retrieved from Solar System Exploration:
NASA Science website: https://solarsystem.nasa.gov/solar-system/oursolar-system/overview/
Phoenix Mars Mission - Education - Mars 101 - Mars/Earth Comparison Table.
(2019). Retrieved from Arizona.edu website:
http://phoenix.lpl.arizona.edu/mars111.php
What Makes a World Habitable? (n.d.). Retrieved from
https://www.lpi.usra.edu/education/explore/our_place/hab_ref_table.pdf
16
What’s In
Lesson 1
1. Mercury
2. Neptune
3. Jupiter
4. Uranus
5. Saturn
6. Earth
7. Venus
8. Mars
Lesson 2
1. atmosphere
2. geosphere
3. atmosphere
4. hydrosphere
5. biosphere
What I Have Learned
1. distance
2. protect
3. energy-rich
4. nutrients
5. matter
6. land
7. water
8. living
9. gases
10. nitrogen
17
What’s More
Activity 1
1. True
2. True
3. False
4. False
5. True
6. False
7. True
8. True
9. True
10. False
Activity 2
A.
1.
2.
3.
4.
5.
A
C
D
C
C
B.
1.
2.
3.
4.
5.
atmosphere
hydrosphere
geosphere
biosphere
atmosphere
What I Can Do
1. Possible answers:
•
Both have some common gases in their atmospheres.
•
Carbon dioxide in Mars is useful for photosynthetic
organisms.
Both have volcanoes.
Length of day are almost the same.
Polar caps are both covered in ice water.
•
•
•
2. Sample answers:
•
GEO/HYDRO/ATMOSPHERE ON BIOSPHERE: lesser
pollution will lead to better health of the people
•
BIOSPHERE ON GEO/HYDROSPHERE: people are using
more PPE that could end up on land and water causing
pollution
GEO/HYDROSPHERE ON BIOSPHERE: land and water
pollution could affect people’s health
•
Answer Key
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: blr.lrqad@deped.gov.ph * blr.lrpd@deped.gov.ph
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