Primary 4 Science — Energy Practice | Standard

Standard Science Primary 4 Energy

Why are there gaps left between railway tracks?

A To allow trains to move faster.

B To allow for expansion on hot days.

C To save on the cost of metal.

D To prevent the tracks from rusting.

Show Worked Solution

Step 1: Metals expand when they gain heat. Step 2: On hot days, tracks get longer. Step 3: Gaps provide space so the tracks don't buckle or bend.

Correct answer: To allow for expansion on hot days.

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