This document discusses characteristics of Earth that support life. It includes four subsystems that make up Earth: geosphere, hydrosphere, atmosphere, and biosphere. The document outlines five key biological factors necessary for life on Earth: temperature, water, atmosphere, energy, and nutrients. Learners are asked questions about which factors are most important and how the factors relate to supporting life. The final activity asks learners to illustrate or write about two biological factors of Earth.

1. Earth and Life
Science

2.  The formation of the universe and the solar system
 The subsystems (geosphere, hydrosphere, atmosphere,
and biosphere) that make up the Earth.
 The Earth’s internal structure.

3. Learning Objective
● Describe the characteristics of Earth that are
necessary to support life. ( Lesson 1)
● Explain that the Earth consists of four subsystems,
across whose boundaries matter and energy flow.
(Lesson 2)
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11. Process Questions
Based on the activity we did a while ago,
a. What have you noticed on the illustrations used to guess
the keywords?
b. Are the illustrations related with each other? If yes, how are
they related? If no, why you say so?
● c. Did you correctly guess all the keywords?
● d. Using all the keywords from the activity, what important
● idea can you form from it?
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12. Let’s talk about Earth!
● Earth, otherwise known as the world,
is the third planet from the sun and
the only object in the
universe known to harbor life.
● It is the fifth-largest planet in the
Solar System, being the largest of the
terrestrial planets with the highest
density.

13. Let’s talk about Earth!
The following are the characteristics of Earth necessary to
support life.
TEMPERATURE
It influences how quickly atoms, molecules or
organisms move.
Low temperature slows down chemical
reaction and produces ice that makes liquid
water unavailable.
High temperature can cause breakdown of
important biological molecules

14. Let’s talk about Earth!
The following are the characteristics of Earth necessary to
support life.
WATER
● It is one of the important ingredients in the
different biological process. Absence of these
will interfere reactions necessary for life.
● However, solid form of this will also hinder
living organisms to use it.
● Water on earth has different forms. It is solid
(ice) in the two poles and liquid along the
equator which allows living organisms to
consume it.

15. Let’s talk about Earth!
The following are the characteristics of Earth necessary to
support life.
ATMOSPHERE
● It provides significant insulation or shielding from the sun
and impact of small to medium size meteorites. Greenhouses
like carbon dioxide (CO2) and methane (CH4) trap heat and
protects our planet from freezing. Moreover, ozone (O3) layer
shields the earth surface from harmful UV radiation.
● Atmosphere also provides chemicals needed for life, such as
nitrogen and carbon dioxide. The size of the planet and its
distance from the sun affects its ability to hold significant
amount of atmosphere.
● Earth has a right size and distance from the sun that permits
it to have a right amount of atmosphere. The presence of
gravity also helps in sustaining its atmosphere.

16. Let’s talk about Earth!
The following are the characteristics of Earth necessary to
support life.
ENERGY ● Earth has available energy-rich sunlight that
support life. Living organisms like plants and
photosynthetic bacteria use light as the source of
their energy.
● Some chemosynthetic organisms rely on chemical
energy to support various biological process.
● Earth is at the right position from the sun that
enables it to harness enough amount of sunlight.

17. Let’s talk about Earth!
The following are the characteristics of Earth necessary to
support life.
NUTRIENTS ● It is an essential factor used to build and
maintain organisms body structure, insufficient
or absence of nutrients can impede synthesis of
the different biological molecules.
● In our planet, there are process that recycle
nutrients. Water, carbon and oxygen, phosphate
and nitrogen cycle are some of the example.
● Volcanism also helps in cycling the nutrients.

18. Process Questions
1. Do you agree that those five biological factors of Earth are
necessary to support life? Why?
2. If you will add one biological factor of Earth, which you
think is necessary to support life, what is it and why?
● 3. Among the five biological factors of Earth,
● which do you think is more important than
● the others? Why?
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19. Application:
Base on the learning you have about the different characteristics
of Earth that is necessary to support life, choose two biological
factors then describe each by illustrating (drawing) or writing a
short essay (relating those biological factors on your own
experiences) in one whole sheet of paper. Once done submit your
work to the teacher.
Scoring:
a. Creativity – 5 points
b. Content – 3 points
c. Cleanliness – 2 points
TOTAL – 10 points
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20. Study in Advance:
The Earth’s Four Subsystems

21. Thank You!
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