The document discusses the factors that make Earth unique and habitable compared to other planets, such as the presence of life, oxygen, moderate temperatures, nutrients, and an atmosphere. It compares Earth to Venus and Mars, noting differences in composition, size, distance from the sun, and rotational speed. The document also explores what makes a planet habitable and includes activities about terraforming Mars and creating an imaginary planet.

1. ORIGIN AND STRUCTURE
OF THE EARTH

2. MOST ESSENTIAL LEARNING COMPETENCY
Recognize the uniqueness of Earth,
being the only planet in the solar
system with properties necessary to
support life.

3. REVIEW
Identify the planets in the solar system.

4. Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune

5. What makes Earth unique from the rest of
the planets?

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L I F E

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O X Y G E N

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T E M P E R A T U R E

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N U T R I E N T

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A T M O S P H E R E

12. COMPARING AND CONTRASTING THE PLANETS

13.  Venus, Earth, and Mars are part of the inner terrestrial or "rocky" planets. Their
composition and densities are not too different from each other.
 Venus is considered to be the Earth's twin planet. It has a very similar size and
mass with the Earth. Mars is about half the Earth's size.
 Orbital period and velocity are related to the planet's distance from the sun.
Among the three planets, Venus is the nearest and Mars is the farthest from
the Sun.
 Rotational speed of Earth and Mars are very similar. Rotational speed of Venus
is extremely slow.
 Abundance of liquid water on Earth, hence the blue color. The Earth is a
habitable planet.

15. What are the factors that make a
planet habitable?

18. ACTIVITY 2. INTERSTELLAR CRASH LANDING
 Imagine yourselves in an interstellar voyage. Your spaceship suffers
mechanical problems and will be forced to land. Fortunately, you
are passing through the Yanib System , which is composed of a
sun-like star surrounded by seven planets, some of which have
moons . The profiles of planets and moons of the Yanib System are
listed on Table 3.
 Decide the best place to land your ship.
 Write down on a piece of paper your choice of planet or moon.
Reasons for your choice should also be written down.
 Reasons why you did not choose the other planets should also be
included.

19. ACTIVITY 2. INTERSTELLAR CRASH LANDING
Include a sketch/diagram of how you think
your habitable planet/moon would look
like based on the factors for habitable
planet/moon.

21. HOME-BASED ACTIVITIES
Activity 1: Terraforming Mars
Directions: Answer this
question: Can man change or
adjust Mars’ environment to
make it more suitable for
human habitation? How?
Activity II: Creating a Planet
Directions: 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.

22. Activity 1: Terraforming Mars
Directions: Answer this question: Can man
change or adjust Mars’ environment to make
it more suitable for human habitation? How?
List down your answers on the table.