Standard Science Primary 4 Energy

A metal ball can just pass through a metal ring. After the ball is heated over a flame for 5 minutes, it can no longer pass through the ring. This is because the ball __________.

A lost heat and expanded
B gained heat and contracted
C gained heat and expanded
D lost heat and contracted
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Worked Solution

Step 1: Heating adds heat energy. Step 2: Gaining heat causes the particles to move further apart, leading to expansion. Step 3: An expanded ball is too large for the ring.

Correct answer: gained heat and expanded

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