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Dec 28, 2015
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The Water Cycle
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Click on picture for neat explanation of the Water Cycle
The water cycle greatly affects weather and living things
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Vocabulary:
water cycle
The movement of water between the ground and the
atmosphere
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You might think that rain brings new water to Earth
But there is no new water on Earth
The sun heats water on Earth and changes it from a liquid to
gas called water vapor
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The first step of the water cycle involves the sun
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Vocabulary:
water vapor
water in the form of a gas
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The water vapor goes into the air
This process is called evaporation
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Vocabulary:
evaporation
The process by which water changes from a liquid to a gas
and goes into the air
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It is evaporation that dries a puddle in the sun after the rain
In the second step of the cycle, water vapor in the air changes
back to a liquid
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This happens when warm air holding water vapor gets cooler
This process is called condensation
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Vocabulary:
condensation
The process by which water vapor in the air changes to
liquid water
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The tiny water drops in the air are packed closer and closer
together until they start to join
Clouds are formed when thousands of drops are so close together that you cannot see
through them
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Video on “Cool Clouds” 7:15
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As clouds become cooler,
the drops join together to make bigger drops
Finally, they become heavy enough to fall back to Earth as
rain or snow
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This falling rain or snow is the third step in the water cycle
The word “cycle” usually means circle
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The water cycle is like a circle because it has no beginning or
endYep you got it another version of “The Water Cycle”
3:37
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There really is no new water on Earth
Click for Bill Nye the Science Guy “Water Cycle Jump”
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