Standard Science Primary 4 Energy

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

A the ball gained heat and its mass increased
B the ball gained heat and expanded
C the ball lost heat and became heavier
D the ring lost heat and contracted
Show Worked Solution

Worked Solution

Step 1: Heating causes the metal ball to gain heat. Step [2-9]: Most materials expand (increase in volume) when they gain heat. Step [2-9]: The expanded ball is now too large for the ring.

Correct answer: the ball gained heat and expanded

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