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 remains the same.
B His weight decreases but his mass remains the same.
C Both his mass and weight decrease.
D Both his mass and weight remain 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 pull on an object. Step 3: The Moon has a weaker gravitational pull than Earth, so weight will decrease.

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

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