How clouds are generated

Cloud and Weather

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×How clouds are generated?

The air temperature falls
When the air is risen up higher, the mass of air expands in the upper sky because in the upper sky atmospheric pressure is lower than the ground level. When the air expands, it will lose energy(heat) and its temperature falls. But air temperature falls mainly by the cold temperature in the upper sky.

Warm Moist Air
The amount of water in the air depends on the air temperature. Warmer air can hold more water because the 'space' between molecules is larger. When warm, wet air meets cool, dry air, the warm air starts to cool and the water it contains falls out as rain.

»»»see the picture below»»» »
low temperature and cloud

How do small waterdrops grow to rain

»»»see the animation»»» »
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×Family of Cloud ×How clouds are generated?

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from NASA kids

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How do clouds form? at NASA

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Where does weather come?

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