Earth's Atmosphere and Wind

4. The ___________ effect natural process that keeps earth's atmosphere at a temperature that is necessary for life on earth.
6. What type of thermal energy would allow a hawk to fly without flapping its wings.
7. This layer is 1,000 times thinner than the troposphere.
9. The thermal energy that comes from the sun.
13. The direction that the earth rotates.
14. Which way do the winds turn in the Northern Hemisphere?
17. Which way do the winds turn in the Southern Hemisphere?
19. Elevation above sea level.
20. Water in the form of gas is called _________.
21. This layer is the thinnest and made of mostly hydrogen and helium.

1. Caused by particles from the sun that enter the thermosphere near the poles, they appear to glow.
2. Air pressure is usually measured with a __________.
3. The layer of the atmosphere that we live in is the _________.
5. This layer is where the space station and many satellites orbit the earth.
8. The land is a better _______ than the ocean.
10. As altitude decreases, air pressure and density ________.
11. The pressure caused by the weight of a column of air pushing down on an area.
12. This layer is hard to study and is the coldest layer of the atmosphere.
15. Winds traveling from the poles to the equator turn due to the _________ effect.
16. What type of breeze usually happens during the day?
18. Westerly wind is blowing towards the ________.