Standard Science Primary 4 Energy

What happens to the volume of a metal ball when it is heated?

A It decreases because the ball contracts.
B It decreases because the ball melts.
C It increases because the ball expands.
D It remains the same.
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Worked Solution

Step 1: Heating means the metal ball gains heat. Step [2-9]: When substances gain heat, they usually expand. Step [2-9]: Expansion results in an increase in volume.

Correct answer: It increases because the ball expands.

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