Standard Science Primary 5 Cycles

Sara poured cold water into a glass. After a few minutes, she saw water droplets on the outer surface of the glass. Where did the water droplets come from?

A Cold water evaporating and then condensing
B Water leaking through the glass
C The coldness of the glass turning into water
D Water vapour from the air condensing
Show Worked Solution

Worked Solution

Step 1: The air contains invisible water vapour. Step 2: Water vapour loses heat to the cold outer surface of the glass. Step 3: The vapour turns into liquid water droplets (condensation).

Correct answer: Water vapour from the air condensing

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