Foundation Science Primary 5 Cycles

Why is rainwater considered a source of fresh water even though it evaporates from the salty sea?

A Salt evaporates with the water.
B Salt is left behind during evaporation.
C Clouds filter the salt out.
D Rain becomes fresh when it touches the ground.
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Worked Solution

Step 1: Evaporation only turns the liquid water into gas. Step 2: Dissolved substances like salt do not evaporate at these temperatures. Step 3: Only the pure water vapour rises to form clouds.

Correct answer: Salt is left behind during evaporation.

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