Standard Science Primary 5 Cycles

Siti poured cold water into a glass cup. After five minutes, she noticed water droplets forming on the outer surface of the glass. Where did the water droplets come from?

A Warm water vapour from the surrounding air lost heat and condensed.
B Cold water vapour from the surrounding air gained heat and evaporated.
C The cold glass melted into water.
D Cold water seeped through the glass.
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Worked Solution

Step 1: Identify the temperature difference: The glass surface is colder than the surrounding air. Step 2: Warm water vapour in the surrounding air comes into contact with the cooler glass surface. Step 3: The water vapour loses heat and condenses into tiny water droplets. Step 4: Final Answer: Warm water vapour from the surrounding air lost heat and condensed.

Correct answer: Warm water vapour from the surrounding air lost heat and condensed.

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