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HUMIDITY AND CLOUDS

HUMIDITY AND CLOUDS. Humidity: the amount of water vapor in the air Relative humidity: percentage of moisture air holds relative to what it could hold at a given temperature Air then becomes saturated, and clouds can form. Clouds. Warm, moist air rises and then cools in the atmosphere

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HUMIDITY AND CLOUDS

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  1. HUMIDITY AND CLOUDS • Humidity: the amount of water vapor in the air • Relative humidity: percentage of moisture air holds relative to what it could hold at a given temperature • Air then becomes saturated, and clouds can form

  2. Clouds • Warm, moist air rises and then cools in the atmosphere • Cold air can’t hold as much moisture, so it soon becomes saturated • Water vapor condenses at a certain temperature (this is called dew point)

  3. Clouds • Clouds form when moisture in the air condenses on small particles of dust or other solids in the air. • Classified by their shape and altitude • 3 major types

  4. Cumulus Clouds • Billowy clouds that resemble cotton balls • Usually low level • Usually fair weather • Cumulonimbus: thunderstorms

  5. Stratus Clouds • Very low altitudes • Cover large areas • Smooth and gray and can block the sun • Fair and bad weather • Nimbostratus: rain and snow

  6. Cirrus Clouds • Feathery or fibrous looking • Very high altitude • Fair weather, but can indicate bad weather • Cirrocumulous: commonly appear just before snow or rain

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