Standard Science Primary 4 Energy

When a metal ball is heated, what happens to its mass and volume?

A Mass decreases, volume remains the same.
B Mass remains the same, volume increases.
C Mass remains the same, volume decreases.
D Mass increases, volume increases.
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Worked Solution

Step 1: Heating provides energy but does not add or remove particles (matter). Step [2-9]: Therefore, mass remains unchanged. Step [2-9]: Heat gain causes the particles to move further apart, resulting in expansion (increased volume).

Correct answer: Mass remains the same, volume increases.

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