Weather terms

3. The ozone layer is a thin part of Earth's atmosphere that absorbs almost all of the sun's harmful ultraviolet light.
4. the average weather conditions of a particular place or region over a period of years
6. The process by which water on the ground surface enters the soil
9. measures wind speed and direction
11. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
13. the boundary between two air masses
15. Measures air pressure in inches of mercury or millibars

1. A boundary between two air masses
2. When a cold air mass collides and slides under a warm air mass, a cold front forms
5. When a liquid turns into a gas
7. Large bodies of air with the same temperature and humidity
8. Runoff is water that falls on a watershed that does not soak into the ground to become groundwater
10. The lowest layer of the earth's atmosphere
12. Humidity is the amount of water vapor in the air
14. Any form of water that falls from clouds and reaches Earth's surface