Standard Science Primary 6 Energy

Jun Jie poured 100ml of water at 80°C into a metal cup and 100ml of water at 80°C into a plastic cup. After 10 minutes, the water in the metal cup was cooler. Why?

A Metal is a better conductor of heat than plastic.
B Plastic is a better conductor of heat than metal.
C The metal cup gained heat from the water slower.
D Plastic allows heat to pass through it faster.
Show Worked Solution

Worked Solution

Step 1: Heat travels from the hot water to the cooler surroundings. Step 2: Metal is a good conductor of heat, so it facilitates faster heat loss. Step 3: Plastic is a poor conductor (insulator) and slows down heat loss.

Correct answer: Metal is a better conductor of heat than plastic.

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

Start Free Trial — 7 Days Free