Weather and Climate

6. occur low in the troposphere. They form in layers that spread horizontally and may cover the entire sky like a thick blanket.
8. systems have more air pressure than their surroundings.
9. When a warm air mass runs into a cold air mass
10. occurs when a cold air mass runs into a warm air mass.
17. a snow storm that has high winds.
18. is the state of the atmosphere, including temperature, atmospheric pressure, wind, humidity, precipitation, and cloud cover.
20. form high in the troposphere. Because it is so cold they are made of ice crystals. They are thin and wispy.
21. Systems that have less pressure
22. an enormous storm with high winds and heavy rains.
23. known for their heavy rains and lightning.
24. the amount of water vapor in the air.

1. The air heats and expands so quickly that it explodes.
2. The temperature at which water vapor condenses
3. a huge release of electricity.
4. shows the continuous movement of water within the Earth and atmosphere.
5. all weather conditions for a particular location averaged over a long period of time.
7. a funnel-shaped cloud of whirling high winds.
11. This is the percent of water vapor in the air relative to the total amount the air can hold.
12. is very high water located in the low pressure eye of the hurricane.
13. Sometimes two air masses stop moving when they meet.
14. This instrument is used to measure wind speed.
15. a warm air mass becomes trapped between two cold air masses.
16. measures the amount of air (barometric) pressure in the air.
19. white and puffy. Convection currents make them grow upward and they may grow very tall.