Planet Earth and Its Subsystem

Why is the Earth called "the living planet"?

• Because it sustains life.

• Because it has atmosphere.

• Because it has water at the surface.

• All of the mentioned choices.

What makes the planet Earth habitable compared to other planets?

• It has soil.

• It has trees.

• It has people.

• It has liquid water.

Which of the following best describes the surface of the planet Earth?

• a thick layer of hydrogen gas

• cloudy and hot with lots of volcano

• cold, rocky, and covered with red rust

• mostly water surface with some areas of life

Which is supported and sustained by planet?

• life

• a moon

• a rocky core

• an atmosphere

How many percent of water comprises the Earth?

• 15%

• 30%

• 50%

• 70%

Which statement about the Earth's energy in sustaining life is incorrect?

• Earth survives in too little energy.

• Earth is in the right distance from the sun.

• Earth is kept warm by an insulating atmosphere.

• Earth has magnetic field to protect from solar radiation.

Which distinct characteristics made Earth different from any other planet?

• It is the only rocky planet.

• It is the only planet that turns around the space.

• It is the only planet that has a large amount of liquid water.

• It is the only planet that changes its structure.

Which is NOT true about Earth when compared to Mars?

• It has life mechanism.

• It has water and atmosphere.

• It has carbon dioxide in the atmosphere.

• It has atmosphere that supports oxygen.

Which of the following is the reason why planet Earth is also called as the "blue planet"?

• It has atmosphere.

• It has lots of volcano.

• It is covered with red dust.

• It has mostly water on the surface.

Earth can support the survival of organisms. What is/are the factor/s that make/s the Earth habitable?

I. Atmosphere

II. Energy

III. Temperature

IV. Nutrient

V. Light

• I, II, III, V

• I, II, III, IV

• II, III, IV, V

• I, II, IV, V