Standard Science Primary 6 Interactions

An astronaut travels from Earth to the Moon. Which of the following statements about his mass and weight is correct?

A His mass decreases but his weight stays the same.
B His mass stays the same but his weight decreases.
C Both his mass and weight decrease.
D Both his mass and weight stay the same.
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Worked Solution

Step 1: Mass is the amount of matter in an object and is constant everywhere. Step 2: Weight is the gravitational force acting on an object. Step 3: Since the Moon's gravity is weaker than Earth's, his weight decreases while his mass remains unchanged.

Correct answer: His mass stays the same but his weight decreases.

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