Standard Science Primary 5 Cycles

What must happen to water at 0°C for it to become ice?

A It must gain heat.
B It must lose heat.
C It must evaporate.
D It must increase its temperature.
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Worked Solution

Step 1: Water at 0°C is at its freezing point. Step 2: To change state from a liquid to a solid (ice), it must continue to lose heat to its surroundings. Step 3: During this change of state, the temperature remains constant at 0°C.

Correct answer: It must lose heat.

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