Weather

2. lines joining places on the map that have the same air pressure
5. clouds that look like cotton
6. measure of the amount of water vapor in the air
11. known as the heat sphere, includes ionosphere and exosphere, Northern Lights occur here
12. front clouds and heavy precipitation
14. lowest layer of the atmosphere. Temperature decreases as you go up, all weather occurs here
15. extend through all levels , rain, storms
17. warm and cold air mass meets but neither can move the other; clouds and many days of precipitation

1. front fast moving warm air mass overtakes a slower cold air mass; clouds and many days of precipitation
3. front warm air mass is cut off
4. humidity the percentage of water vapor that is actually in the air compare to the maximum amount of water vapor the air can hold at a particular temperature
7. lines joining places that have the same temperature
8. Air temps increase with height above earth because the ozone layer is absorbing the sun's rays. Calm layer that allows undisturbed flight
9. an instrument used to measure relative humidity
10. air temp decreases with height above earth, coldest layer, protects from meteoroids, contains ozone layer
13. clouds that form in flat layers
16. wispy, feathery clouds