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| Refers to the state of the atmosphere at a specific time and place |
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| made up of molecules that are always moving randomly |
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| Measure of the average amount of motion of molecules |
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| Because air moves from areas of low pressure |
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| The amount of water vapor present in the air |
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| weather casters report the amount of moisture in the air |
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| changes the amount of water vapor in the air |
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| they form as warm air is forced upward, expands, and cools |
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| How do people classify clouds |
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| classified mainly by shape and height |
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| stratus cumulus and cirrus |
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| form layers, or smooth, even sheets in the sky. Usually form at low altitudes and may be associated with fair weather or rain or snow. When the air is cooled to its dew point near the ground it forms a stratus cloud called fog |
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| clouds are masses of puffy, white clouds, often with flat bases They sometimes tower to great heights and can be associated with fair weather or thunderstorms. |
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| Clouds appear fibrous or curly, they are high, thin, white, feathery clouds made of ice crystals. Associated with fair weather but they can indicate approaching storms. |
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| some prefixes of clouds names describe the height of of the cloud base. |
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| descirbes high elevation clouds |
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| describes middle-elevation clouds |
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| refers to clouds at low elevation |
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| Rain or Snow Producing Clouds |
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| clouds associated with rain or snow often have the word nimbus attatched to them. The term nimbus is "dark rain cloud" |
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| Water falling form clouds |
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| IS precipitation that forms of lumps of ice, Hail forms in cumulonimbus clouds of a thunderstorm when water freezes in layers around a small nucleus of ice. |
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| Describes air pressure, wind, temperature, and the amount of moisture in the air. |
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