Standard Science Primary 4 Energy

Luke placed an inflated balloon in a freezer. After an hour, the balloon appeared smaller. Why?

A The air inside contracted when it lost heat.
B The rubber of the balloon melted.
C Air leaked out through the freezer vents.
D The air in the balloon lost mass.
Show Worked Solution

Worked Solution

Step 1: The cold environment causes the air in the balloon to lose heat. Step [2-9]: Heat loss causes gases to contract. Step [2-9]: Contraction results in a decrease in volume.

Correct answer: The air inside contracted when it lost heat.

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