Standard Science Primary 4 Energy

A flask completely filled with red-coloured water was placed in a basin of hot water. What will happen to the water level in the glass tube after 5 minutes?

A It will rise.
B It will remain the same.
C It will drop.
D It will boil immediately.
Show Worked Solution

Worked Solution

Step 1: The flask gains heat from the hot water. Step 2: The heat is transferred to the red-coloured water inside. Step 3: Liquids expand (increase in volume) when they gain heat, causing the level to rise.

Correct answer: It will rise.

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