1) The Earth is the only planet in the solar system that supports life. Which of these best explains the statement? a) The Earth is exposed to the sun’s rays b) The Earth has only one moon that orbits around it. c) The Earth rotates in its axis. d) The Earth has breathable atmosphere. 2) Which of the following contributes to Earth’s ability to sustain life? a) The Earth is just at the right distance from the sun. b) The Earth’s core creates a strong and stable magnetic field. c) The Earth has a precisely tuned amount of water. d) All of these. 3) How does the giant planet Jupiter help in sustaining life on Earth? a) It protects the Earth from solar flares. b) It stabilizes the Earth’s rotation. c) Jupiter’s gravitational pull prevents asteroids from entering the Earth. d) It shields the Earth from the sun’s ultraviolet radiation. 4) Below are the unique properties of the Earth, EXCEPT: a) Strong magnetic field. b) Scarce amount of liquid water. c) Presence of the moon. d) Located in the Goldilocks zone. 5) How does the core help in sustaining life on our planet? a) It creates magnetic field that protects living things from cosmic rays. b) It regulates the temperature inside the earth. c) It facilitates the formation of magma. d) It supplies the people with enough iron to fight common diseases. 6) How does Earth differ from its twin planet Venus? a) Earth has a medium-layered atmosphere while Venus has a thin atmosphere. b) Earth has a lower surface temperature than Venus. c) Earth’s distance from the sun is nearer compared to Venus. d) Earth is bigger in radius than Venus. 7) What is a Goldilocks zone? a) It is the area that receives most of the heat and light coming from the sun. b) It is the area that has the strongest magnetic field.a. It is the area that receives most of the heat and light coming from the sun. c) It is the area that has the strongest gravitational pull. d) It is the area that receives enough energy to allow water to exist as a liquid on its surface. 8) These are the things that would happen if the Earth’s core cools down, EXCEPT: a) The atmosphere will disappear. b) There will be more volcanic eruptions and earthquakes. c) The Earth will be vulnerable to incoming solar and cosmic radiations. d) The plates on the surface will no longer move. 9) What is the role of the moon in making Earth as the only planet to sustain life? a) It causes extreme temperatures. b) It causes very high and low tides. c) It causes stability of the Earth’s rotation. d) It causes irregular days and nights. 10) The following are the factors that make a planet habitable, EXCEPT: a) temperature b) water c) atmosphere d) none of the above

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