1. #1  About 78% of the air is composed of this gas.

2. #2  The atmospheric layer closest to earths surface.

3. #3  The transfer of heat energy through empty space by light and other electromagnetic waves.

4. #4  The earth’s early atmosphere was formed primarily from?

5. #5  Out of every 100 units of radiation that enter the earths atmosphere, how many units are absorbed by the earth?

6. #6  At which angle of insolation does the earth surface receive the maximum amount of energy? 30, 60, or 90 degrees

7. #7  Smog is caused primarily by what?

8. #8  Ozone in the stratosphere is very important for what reason?

9. #9  Part of the thermosphere that is made of electrically charged particles.

10. #10  A city and a forest are located in the same region. On a hot summer day which would have cooler temperatures.

11. #11  Do high latitudes, middle latitudes, or latitudes near the equator receive the most vertical rays from the sun from the sun?

12. #12  Would the air cool quickest on a clear night, cloudy night, or clear day?

13. #13  Which layer of the earth’s atmosphere does all the weather occur?

14. #14  At what time are the rays of the sun strongest ?

15. #15  The measure of the average kinetic energy of the atoms or molecules in a substance.

16. #16  What are the 2 most abundant gases in the earth’s atmosphere?

17. #17  The freezing point and boiling point of water on the Celsius scale are?

18. #18  Energy from the sand on the beach is transfered to your feet by what means?

19. #19  When does a temperature inversion happen? Use warm air and cold air in your answer.

20. #20  The amount of this gas in the atmosphere varies depending on the humidity.