Standard Science Primary 4 Energy

Gaps are left between sections of concrete on a pavement. What is the purpose of these gaps?

A To save on the cost of concrete.
B To allow the concrete to contract on hot days.
C To allow the concrete to expand on hot days.
D To prevent water from collecting on the pavement.
Show Worked Solution

Worked Solution

Step 1: Concrete gains heat on sunny days and expands (increases in volume). Step 2: Without gaps, the pavement would buckle or crack. Step 3: Gaps provide space for this expansion.

Correct answer: To allow the concrete to expand on hot days.

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

Start Free Trial — 7 Days Free