10. Which of the following is NOT part of earth’s atmosphere?


A. asthenosphere
B. mesosphere
C. stratosphere
D. troposphere


11. Which of the following correctly describes the condition called global warming?


A. Too little carbon dioxide in the Earth’s atmosphere.


B. Too much carbon dioxide in the Earth’s atmosphere.


C. Just the right amount of carbon dioxide in the Earth’s atmosphere.


D. None of the above.


12. Which of the following is TRUE about the air’s temperature at different elevations?

Air closer to _________.


A. space is cooler
C. the ground is cooler

B. space is warmer
D. the ground is neither cold nor warm


13. Which gas is the second most abundant in the Earth’s atmosphere?


A. argon
B. carbon dioxide
C. Nitrogen
D. oxygen


14. Which layer has large temperature changes – protecting the Earth from solar

radiation and creates the auroras?


A. mesosphere
B. stratosphere
C. thermosphere
D. troposphere


15. Which of the following actions is NOT done by the earth’s atmosphere?


A. Forms volcanoes.


B. Keeps the Earth warm.


C. Provides air for living things on Earth to breathe.


D. Protects the Earth from ozone, comets, and meteorites.​