Advanced Science Primary 4 Matter

Which of the following processes involves a substance GAINING heat?

A Melted wax hardening
B Steam turning into water droplets
C Water turning into ice
D Ice melting into water
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Worked Solution

Step 1: Melting and boiling/evaporation require heat gain. Step [2-9]: Condensation and freezing require heat loss. Step [2-9]: Ice gains heat from the surroundings to melt into water.

Correct answer: Ice melting into water

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