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33 Cards in this Set
- Front
- Back
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water cycle |
water vapor enters the atmoshpere by evaporation from the oceans and other bodeis of water and leaves by condensation |
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evaporation |
the process by which water molecules of liquid water escape into the air after becoming water vapor |
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condensation |
when water vapor turns into a liquid |
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humidity |
measure of the amount of water vapor in the air |
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relative humidity |
percentage of water that is actually in the air compared to the maximum amount of water vapor the air can hold at a particular temp. |
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psychrometer |
two thermometers, a wet bulb-thermometer and a dry bulb-thermometer |
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dew point |
the temp. at which densation begins |
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cirrus |
wispy, feathery clouds |
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cumulus |
clouds that look like cotton |
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stratus |
clouds that form in flat layers |
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precipitation |
any kind of water that falls from the clouds and reaches earths surface |
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rain gauge |
open-ended tube that collects rain |
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flood |
overflowing of water in a normally dry area |
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drought |
a long period of scarce rainfall or dry weather |
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air mass |
a huge body of air in the lower atmosphere that has similar temp., humidity, and air pressure in any hieght |
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tropical |
warm air massesthat have low air pressure |
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polar |
cold air massses that have high air pressure |
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maritime |
air masses that form over oceans |
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Continental |
air masses that form over land |
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jet streams |
bands of high speed winds 10-km above earths surface |
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front |
the boundry where air masses meet |
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occluded |
when warm air masses are cut off the ground |
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cyclone |
a swirling center of low air pressure |
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anticyclones |
high-pressure centers of dry air |
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storm |
violent disurbance in the atmosphere |
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blizzard |
snowstorm with prolonged winds 56km per hour or greater with considerable falling or blowing of snow |
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thunderstorm |
small storm often accompanied by heavy precipitation and frequent thunder and lightining |
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lightining |
a sudden spark, or electrical discharge, as these jump between parts of a cloud, between nearby clouds, or between a cloud and the ground |
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hurricane |
a tropical cyclone with winds up to 119km 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 |
rapidly whirling, funnel shaped cloud that reaches down from a thunderstorm and touches the earths surface |
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evacuate |
move away temporarily |
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meteoroligist |
a scientist who studies and tries to predict weather |
