Earth's Atmosphere

4. The lowest layer of Earth's atmosphere (rain, snow, storms, and most clouds occur here)
5. An instrument that measures atmospheric pressure
7. The continuous process by which water moves from Earth's surface to the atmosphere and back
11. The weight of a column of air pushing down on an area
15. The layer that protects us from the Sun's harmful UV rays
18. A mass of sinking cool air that usually brings fair weather.
19. When two air masses meet
20. A body of air that has about the same temperature and moisture throughout
21. water in the form of a gas
22. When water heats up and changes from water to gas which is known as water vapor

1. The 4th layer of Earth's atmosphere; the hottest layer
2. A mass of rising warm air that usually brings wet, stormy weather.
3. The condition of Earth's atmosphere at a particular time and place.
6. The 3rd layer of the atmosphere(50 to 80 km, most meteorites burn up here)
8. Overall weather in an area over a long period of time
9. The second-lowest layer of Earth's atmosphere (The ozone layer that absorbs ultraviolet radiations)
10. A measure of the mount of water vapor in the air
11. The envelope of gases surrounding the earth or another planet.
12. when water moves across the land surface into streams and rivers, eventually reaching the ocean
13. When water vapor is cooled in the atmosphere and changes back to water to form a cloud
14. Any form of water that falls from clouds and reaches Earth's surface (rain, snow, hail, etc)
16. The outer layer of the atmosphere, extending outward into space.
17. Similar to evaporation, water is changed to gas but from plants