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32 Cards in this Set
- Front
- Back
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water cycle |
the continual movement of water among earths atmosphere, oceans, and land surface through evaporation, condensation, and precipitation |
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evaporation |
the process by which molecules at the sirface of a liquid absorb enough energy to change into a gas |
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condesation |
the change in state from a gas to a liquid |
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humidity |
the amount of water vapor in a given volume of air |
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relative humidity |
the percentage of water vapor in the air compared to the maximum amount of water vapor that air can contain at a particular temperature |
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psychrometer |
an instrument used to measure relative humidity |
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dew point |
the temperature at which condesation begins |
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cirrus |
wispy, feathery, clouds made of ice crystals that form at high levele |
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cumulus |
fluffy white clouds usually with flat bottoms that look like rounded piles of cotton |
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stratus |
clouds that form in flat layers and often cover most of the sky |
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precipitation |
any form of water that falls from clouds and reaches earths surface as rain, snow, sleet, or hail |
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rain gauge |
an instrument used to measure precipitation |
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flood |
an overflowing of water in a normally dry place |
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drought |
a long period of low precipitation |
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air mass |
a huge body of air that has similar temperature, humidity, and air pressure at any given height |
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tropical |
a warm air mass that forms in the tropics and has low air pressure |
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continental |
a dry air mass that forms over land |
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jet stream |
bands of high speed winds about 10 kilometers above earths surface |
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cyclone |
a swirling center of low air pressure |
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anticyclone |
a high pressure center of dry air |
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storm |
a violent disturbance in the atmosphere |
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blizzard |
a snow storm with prologeds of 56 km per hour or greater bowing snow that reduces visibility |
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thunderstorm |
a small storm often accompained by heavy precipitation and frequent thunder and lightning |
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lightning |
a dudden spark or energy discharge caused when electrical charges jump between parts of a cloud, between nearby clouds, or between a cloud and the ground |
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hurricane |
a tropical storm that has winds of about 119km per hour or higher |
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storm surge |
a dome of water that sweeps across the coast where a hurricane lands |
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tornado |
a radidly whirling funel shaped cloud tha reaches down and touches earths surface |
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evacuate |
moving away from an area temporarily from an area about to be affected by sevre weather |
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meteorologist |
scientists who study the causes of weather to predict |
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isobar |
a line on a weather map that joins places that have the same temperture |
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isotherm |
a line on a weather map that joins places that have the same air pressure |
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front |
a boundary where unlike air masses meet but do not mix |
