Standard Science Primary 4 Energy

Siti poured 100ml of hot water at 90°C into a metal cup. After 10 minutes, the temperature of the water dropped to 60°C. Which statement is correct?

A The cup lost heat to the water.
B The water lost heat to the surrounding air.
C The metal cup is a poor conductor of heat.
D The water gained heat from the cup.
Show Worked Solution

Worked Solution

Step 1: Heat flows from a hotter region to a colder region. Step 2: The hot water (90°C) is hotter than the surroundings. Step 3: Heat is transferred from the water to the cup and the air.

Correct answer: The water lost heat to the surrounding air.

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