Standard Science Primary 4 Energy

Jun Jie found it difficult to unscrew a metal cap from a glass jar. He should __________ the metal cap to make it easier to remove.

A pour hot water over
B wrap a cold towel around
C place in a freezer
D pour cold water over
Show Worked Solution

Worked Solution

Step 1: Metals expand when heated. Step 2: Pouring hot water over the metal cap causes it to expand. Step 3: The expanded cap becomes slightly larger and looser, making it easier to unscrew.

Correct answer: pour hot water over

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

Start Free Trial — 7 Days Free