Primary 4 Science — Energy Practice | Standard

Standard Science Primary 4 Energy

Why are there gaps left between the concrete slabs of a pavement?

A To make the pavement look more attractive.

B To provide space for the concrete to expand on hot days.

C To allow for easier drainage of water.

D To save on the cost of concrete.

Show Worked Solution

Step 1: Concrete gains heat and expands on hot days. Step [2-9]: Without gaps, expanding slabs would push against each other and crack.

Correct answer: To provide space for the concrete to expand on hot days.

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