NSES Content Standard D
Earth and Space Science: Structure of the Earth system
Grades 5-8, page 160
Clouds, formed by the condensation of water vapor, affect weather and
climate.
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Benchmark 4B The Physical Setting: The
Earth
Grades 3-5, page 68
When liquid water disappears, it turns into a gas (vapor) in the air
and can reappear as a liquid when cooled, or as a solid if cooled below
the freezing point of water. Clouds and fog are made of tiny droplets of
water.