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Condensation
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The process of a gas changing into a liquid
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Cloud
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Billions of tiny water drops that condensed from the air.
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Cumulus cloud
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Puffy cloud on sunny days
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Cirrus cloud
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Thin, feathery cloud made of ice crystals (often a sign of rain or snow on the way)
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Stratus cloud
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Low, layered cloud, flat gray blanket (brings drizzling rain)
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Evaporation
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The process of a liquid changing into a gas
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Front
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Boundary between air masses with different temperatures
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Precipitation
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Any form of water that falls from clouds to Earth
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Water Cycle
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Constant movement of water from Earth to the atmosphere, and back to Earth.
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Weather map
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Map that shows weather conditions over a large area
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Cold front
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When cold air mass moves into a warm air mass, often produces thunderstorms.
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Warm front
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When a warm air mass moves into a cold air mass, often bringing light rain
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