Standard Science Primary 4 Matter

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

A Evaporation involves heat gain, boiling involves heat loss.
B Boiling is a slow process, evaporation is a fast process.
C Evaporation occurs at a fixed temperature, boiling does not.
D Boiling occurs throughout the liquid, evaporation occurs only at the surface.
Show Worked Solution

Worked Solution

Step 1: Boiling is a rapid process at a fixed temperature involving the whole liquid. Step [2-9]: Evaporation is a slow process occurring at any temperature and only at the surface.

Correct answer: Boiling occurs throughout the liquid, evaporation occurs only at the surface.

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