1. 400 600 800 1000 200 400 600 800 1000 200 400 600 800 1000 200 400 600 800 1000 200 400 600 800 1000 200 temperature Gases Layers Density Misc.

2. The warmest region of the atmosphere

3. What is the thermosphere?

4. A region that starts out warm due to the ozone layer but then cools again due the thin atmosphere

5. What is the mesosphere?

6. This layer has temperatures which a suitable for living conditions.

7. What is the troposphere?

8. This layer is warmer below the ozone layer and colder above it.

9. What is the stratosphere?

10. This layer has the warmest molecules, but is still cold because the molecules are so spread out.

11. What is the thermosphere?

12. 200 Points These two gases are found in almost all layers because they are the two most common.

13. What are Nitrogen and Oxygen?

14. 400 Points This gas is found in the troposphere and is absorbed by plants.

15. What is carbon dioxide?

16. 600 Points This gas makes up the ozone layer.

17. What is oxygen?

18. 800 Points This happens to air pressure resulting in molecules of gas getting farther apart.

19. What is the air pressure decreases?

20. 1000 Points The earth’s first atmosphere was composed of these two gases.

21. What are hydrogen and helium?

22. 200 Points This is the layer where we live.

23. What is the troposphere?

24. 400 Points This layer is almost in outer space.

25. What is the exosphere?

26. 600 Points Planes cruising altitudes are in the lower regions of this layer.

27. What is the stratosphere?

28. 800 Points This is the layer directly in the middle (very cold)

29. What is the mesosphere?

30. 1000 Points This layer is closest to outer space.

31. What is the exosphere?

32. 200 Points This is the most dense layer of the atmosphere.

33. What is the troposphere?

34. 400 Points This is the least dense layer of the atmosphere

35. What is the exosphere?

36. 600 Points This happens to density as you getter closer to the earth.

37. What is the density increases?

38. 800 Points This is a very low dense region that gets very hot.

39. What is the thermosphere?

40. 1000 Points This area of the earth’s surface has the highest density (better remember your sunscreen).

41. What is at sea level?

42. 200 Points What happens to air density as altitude increases?

43. What is decreases?

44. 400 Points This layer of the atmosphere is where all weather occurs.

45. What is the troposphere?

46. 600 Points Satellites orbit the earth in this layer.

47. What is the exosphere?

48. 800 Points This is the region where an aurora borealis will occur.

49. What is the thermosphere or ionosphere?

50. 1000 Points This layer burns up meteors.

51. What is the mesosphere?