HOTS Science Primary 4 Matter

Which of the following is a similarity between boiling and evaporation?

A Both occur throughout the liquid.
B Both occur at a fixed temperature.
C Both occur only at the surface of the liquid.
D Both involve the liquid state gaining heat.
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Worked Solution

Step 1: Compare boiling and evaporation characteristics. Step [2-9]: Boiling is fast and happens at 100°C; evaporation is slow and happens at any temperature. Step [2-9]: Both processes require the liquid to gain heat to change into a gas.

Correct answer: Both involve the liquid state gaining heat.

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