Standard Science Primary 4 Energy

Why are there gaps left between concrete slabs on a pavement?

A To allow water to seep through and water the soil.
B To make the pavement look more attractive.
C To allow the concrete to expand on a hot day without cracking.
D To save on the amount of concrete used.
Show Worked Solution

Worked Solution

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

Correct answer: To allow the concrete to expand on a hot day without cracking.

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free