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6th Unit 5b
Weather and Cliomate Key Terms
| Term | Definition |
|---|---|
| coriolis effect | The way Earth's rotation makes winds in the Northern Hemisphere curve to the right and winds in the Southern Hemisphere curve to the left. |
| water cycle | The natural sequence through which water passes into the atmosphere as water vapor, precipitates to earth in liquid or solid form, and ultimately returns to the atmosphere through evaporation. |
| jet stream | A high-speed, meandering wind current, generally moving from a westerly direction at speeds often exceeding 400 kilometers (250 miles) per hour at altitudes of 10 to 15 kilometers (6 to 9 miles). |
| humidity | A measure of the amount of water vapor in the air. |
| relative humidity | A comparison of the actual amount of moisture in the air to the greatest possible amount that could be in the air at the same temperature and pressure. |
| evaporation | The change of water from liquid water to water vapor. |
| condensation | The process by which water vapor changes from a gas to a liquid. |
| cumulus | Clouds that form less than 2 kilometers above the ground and look like fluffy, rounded piles of cotton. |
| stratus | Clouds that form in flat layers. |
| cirrus | Wispy, feathery clouds made mostly of ice crystals that form at high levels, above about 6 kilometers. |
| barometer | An instrument that is used to measure air pressure and predict changes in the weather. |
| Meteorologist | A science that deals with the atmosphere and with weather. |
| precipitation | The liquid water that returns to Earth's surface, usually as rain or snow. |
| air mass | A huge body of air that has similar temperature, pressure, and humidity throughout. |
| front | The border between two air masses that collide. |
| climate | The average, year-after-year conditions of temperature, precipitation, winds, and clouds in an area. |
| anemometer | An instrument used to measure wind speed. |
| thunderstorm | A very strong storm with a lot of rain, thunder, and lightning. |
| tornado | An intense spiraling windstorm that often forms within a severe thunderstorm. |
| hurricane | A large, spiraling storm system that can be a much as 600 km across. |
Created by:
darrin_evans
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