Standard Science Primary 4 Energy

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

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

Worked Solution

Step 1: Heating a solid causes it to gain heat. Step 2: Gaining heat causes solids to expand (increase in volume). Step 3: The ball becomes too large to fit through the same ring.

Correct answer: The ball gained heat and expanded.

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