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The quantity of matter contained in a body is called its mass. Which statement about mass is correct?
AIt changes when the body is taken to the Moon
BIt stays the same everywhere in the universe
CIt is a vector pointing towards the Earth
DIts SI unit is the newton
Answer & Solution
Correct answer: B. It stays the same everywhere in the universe
1. Mass is the amount of matter in a body, a basic property.
2. It does not depend on location, so it is the same on Earth, the Moon, or in space.
3. Rule out option A: mass is unchanged on the Moon; only weight changes.
4. Rule out option D: the SI unit of mass is the kilogram, not the newton.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 1 "Laws of Motion", p.17_
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