Standard Science Primary 4 Energy

A cup of hot coffee was left on a table in a room at 25°C. Which of the following shows the temperature of the coffee over time?

A It stays at 80°C.
B It decreases until it reaches 0°C.
C It increases.
D It decreases until it reaches 25°C.
Show Worked Solution

Worked Solution

Step 1: Heat travels from a hotter region to a colder region. Step 2: The coffee (hot) loses heat to the room (cooler). Step 3: The cooling stops when both reach the same temperature (room temperature).

Correct answer: It decreases until it reaches 25°C.

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