Advanced Science Primary 4 Cycles

Siti placed 50ml of water in a beaker and covered it with a plastic wrap. After an hour in the sun, she saw droplets on the inner surface of the wrap. Which processes took place?

A Melting then Evaporation
B Evaporation then Condensation
C Condensation only
D Evaporation only
Show Worked Solution

Worked Solution

Step 1: Liquid water gained heat and evaporated into vapour. Step [2-9]: Vapour hit the cooler plastic wrap and lost heat. Step [2-9]: It condensed back into liquid droplets.

Correct answer: Evaporation then Condensation

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