Standard Science Primary 4 Energy

A balloon was tied over the neck of an empty bottle. When the bottle was placed in a freezer, the balloon deflated. This is because the air inside the bottle __________.

A gained heat and expanded
B turned into a liquid
C escaped from the bottle
D lost heat and contracted
Show Worked Solution

Worked Solution

Step 1: The freezer is cold; air inside the bottle loses heat. Step 2: Air (gas) contracts when it loses heat. Step 3: Contraction reduces volume, deflating the balloon.

Correct answer: lost heat and contracted

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