Page 189 - (DK) I Can’t Believe It! 2

A typical cumulus cloud
contains 35 billion cu ft
(1 billion m ) of water
3
vapor, which weighs
1.1 million lb (half
a billion grams).

FAST FACTS
A cumulus cloud is a pocket of
rising warm air containing water
vapor. It expands and cools while
gaining height in the sky. When the
temperature cools to the dew point
Cumulus means (when dew forms), it condenses into
“heap” in Latin and water droplets, forming a cloud.
refers to the cloud’s
resemblance to a pile
of cotton balls.
Cloud
Sun
Cooling,
rising air
pocket
Heat
Rising warm
air pocket

Warm air
and moisture
above ground
Warm
ground

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