Standard Science Primary 6 Interactions

An astronaut brings a 2 kg block of iron from the Earth to the Moon. Which of the following statements is TRUE about the block on the Moon?

A Its mass decreases but its weight remains the same.
B Both its mass and weight decrease.
C Both its mass and weight remain the same.
D Its weight decreases but its mass remains the same.
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Worked Solution

Step 1: Mass is a constant property of matter. Step 2: Weight is the pull of gravity on an object. Step 3: Since the Moon's gravity is about 1/6th of Earth's, the weight will decrease while mass stays 2 kg.

Correct answer: Its weight decreases but its mass remains the same.

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