Standard Science Primary 4 Energy

Why does a person feel cold when they step out of a swimming pool on a windy day?

A The pool water was warmer than the air.
B The person has gained heat from the water.
C The wind blows cold air onto the skin.
D Water on the skin evaporates and takes heat away from the body.
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Worked Solution

Step 1: Evaporation is a process where liquid turns into gas. Step 2: This process requires heat gain from the surroundings (in this case, the person's skin). Step 3: As water evaporates from the skin, it takes heat away, making the person feel cold.

Correct answer: Water on the skin evaporates and takes heat away from the body.

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