Advanced Science Primary 4 Matter

A metal ball could just pass through a metal ring. After heating the ball for 5 minutes, it could no longer pass through the ring. Why?

A The ball gained mass and became heavier.
B The ball expanded and its volume increased.
C The ring contracted and its size decreased.
D The ball changed its state to a liquid.
Show Worked Solution

Worked Solution

Step 1: Heating a solid causes its particles to vibrate more and move slightly further apart. Step [2-9]: This causes the solid to expand, increasing its volume. Step [2-9]: Since the volume increased, it became too large for the ring.

Correct answer: The ball expanded and its volume increased.

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