Standard Science Primary 5 Cycles

Which of the following processes must occur for clouds to form in the sky?

A Water losing heat to freeze.
B Ice melting into water.
C Water vapour losing heat to condense.
D Water droplets gaining heat to evaporate.
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Worked Solution

Step 1: Warm water vapour rises into the atmosphere. Step 2: The higher it goes, the cooler the surrounding air becomes. Step 3: The warm water vapour loses heat to the cooler air and condenses into tiny water droplets, which gather to form clouds.

Correct answer: Water vapour losing heat to condense.

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