Standard Science Primary 4 Matter

Jun Jie has two identical balls. He pumps more air into Ball B. Which of the following statements is TRUE?

A The mass of both balls remains the same.
B Air has no mass so Ball B does not change.
C Ball B has a smaller volume than Ball A.
D Ball B has more mass than Ball A.
Show Worked Solution

Worked Solution

Step 1: Air is matter and therefore has mass. Step 2: Adding more air to Ball B adds more matter. Step 3: Therefore, Ball B becomes heavier (has more mass) than Ball A.

Correct answer: Ball B has more mass than Ball A.

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