Atmosphere

5. Clouds associated with thunder and rain
7. The amount of water vapor in the air
8. Bottom layer of the atmosphere
10. Water vapor condenses to form _________
15. The most abundant gas in Earth's atmosphere
17. The part of the atmosphere that radio waves are bounced off and reflected back to earth
19. Coldest layer of the atmosphere; also protects earth from meteriods
20. The gas removed from the atmosphere through photosynthesis
21. Layer of gases that surround the earth

1. Belts of radiation
2. Fluffy clouds composed mainly of water droplets
3. The process by which water moves through the atmosphere
4. High level "whispy" clouds composed of ice crystals
6. Layer of the atmosphere where the Ozone layer is found
9. Atmospheric pressures decreases with ________ altitude
11. 4th layer of the atmosphere; also called the "Heat Sphere"
12. Absorbs solar radiation and releases it as heat to protect earth from UV rays
13. Top layer of the atmosphere
14. The temperature where water begins to form on surfaces
16. The gas released into the atmosphere through photosynthesis
18. Low-level blanket-like clouds