Weather

2. An instrument used to measure wind direction
5. The process in which plants give off water vapor into Earth's atmosphere.
8. The condition of Earth's atmosphere at a certain time and place
10. The constant movement of water among Earth's atmosphere, oceans, and land surface through evaporation, condensation, and precipitation
13. The change of state from a liquid to a gas
15. Any form of water that falls from clouds in the form of rain, snow, sleet, or hail that reaches Earth's surface.
17. A boundary between two types of air masses
18. One of the factors that causes weather is the _________ heating of the Earth's surface
20. The spinning of Earth on its' axis that is a factor that causes weather.

1. An instrument used to measure precipitation.
3. The distance above sea level
4. An instrument used to measure wind speed
6. Scientists who study the causes of weather and try to predict it
7. An instrument that measures relative humidity
9. The change of state from a gas to a liquid
11. The amount of water vapor in the air at a given time
12. The closer the isobars on a weather map are the ___________ the wind speed.
14. A large body of air that picks up temperature and moisture similar to the part of Earth over which it forms.
16. A thin layer of gases surrounding Earth
19. An instrument used to measure air pressure