Foundation Science Primary 4 Matter

Why are there small gaps between the sections of a metal bridge?

A To allow water to drain away
B To make the bridge lighter
C To allow the metal to expand on hot days
D To save on the cost of metal
Show Worked Solution

Worked Solution

Step 1: Metals are solids that gain heat on hot days. Step [2-9]: Solids expand when they gain heat. Step [2-9]: Gaps prevent the bridge from buckling or warping as the metal expands.

Correct answer: To allow the metal 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