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Weather Patt Vocab
| Term | Definition |
|---|---|
| global winds | winds caused by the unequal heating between the poles and equator, travel thousands of kilometers in steady patterns, and can last for weeks |
| monsoons | winds that change direction with the seasons |
| condensation | the process by which a gas, such as water vapor, changes into a liquid. This occurs when moist air cools |
| dew point | the temperature at which air with a given amount of water vapor will reach saturation |
| air pressure | the force of air molecules pushing on an area |
| saturation | a condition in which the rates of evaporation and condensation are equal (because the air is holding as much water vapor as it can; it is “full”). |
| acid rain | rain that has become much more acidic than normal because of pollution |
| sleet | when rain passes through a layer of cold air, it can freeze before hitting the ground and form small pellets of ice |
| weather | the condition of the Earth’s atmosphere at a particular time and place |
| freezing rain | when raindrops freeze as they hit the ground or other surfaces in cold weather and covers surfaces with a coating of ice |
| barometer | any instrument that measures air pressure |
| hail | lumps or balls of ice that fall from cumulonimbus clouds |
| evaporation | the process by which a liquid changes into a gas as it receives “extra energy" |
| humidity | the amount of water vapor in air |
| Coriolis Effect | the influence of Earth’s rotation |
| jet streams | long-distance winds that usually flow in the upper troposphere from west to east for thousands of kilometers at speeds greater than 200 km/hr (124 mi/hr). |
| relative humidity | compares the amount of water vapor in air with the maximum amount of water vapor that can be present at that temperature |
| wind | air that moves horizontally, or parallel to the ground |
| precipitation | any type of liquid or solid water that falls to Earth’s surface |
| local winds | these winds, such as the land breezes and sea breezes that are caused by the unequal heating between land and water, change daily in regular patterns and blow within small areas |