Standard Science Primary 4 Energy

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

A The ball gained heat and contracted.
B The ball lost heat and contracted.
C The ring lost heat and expanded.
D The ball gained heat and expanded.
Show Worked Solution

Worked Solution

Step 1: Heat gain causes solids to increase in volume. Step 2: Expansion makes the ball larger than the ring's inner diameter. Step 3: Conclusion: The ball gained heat and expanded.

Correct answer: The ball gained heat and expanded.

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