Atmosphere

1. second layer from Earth; air temperature increases with height above Earth due to ozone absorption of sunlight; 14-50km above Earth
4. amount varies in the atmosphere; cycles through the water cycle
6. released into atmosphere by plants as they undergo photosynthesis
7. high level cloud, wispy, curly, composed of ice crystals
8. gas absorbs solar radiation and releases it as heat, protects from harmful UV rays, located in stratosphere
10. Earth's magnetic field; traps harmful particles from the sun; causes northern lights
16. exerted on Earth by the atmosphere; decreases with increased altitude
17. clouds that extend through all levels, rain, storm
19. at greater altitudes the same volume contains fewer molecules of gases; measured with a barometer
20. removed from the atmosphere by green plants

2. "heat sphere," 8okm out into space; temp increases with height above Earth; Northern lights occur here; pace shuttle orbits here
3. lower part of thermosphere
5. third later from Earth; 50-80 km above Earth; air temp decreases with height above Earth; coldest layer; meteoroids burns up in this layer
9. lowest layer; most atmospheric air is found here; extends 0-14km above Earth; virtually all weather occurs here
11. layer of gases that surround the Earth
12. low-level cloud, layers like a blanket, composed of water droplets
13. upper part of thermosphere
14. mid-level cloud, fluffy, dense, mostly composed of water droplets
15. caused by unequal heating of the Earth's surface
18. removed from the atmosphere by bacteria and lightning; used by plants in growth and development