Mass is a measure of what property of matter?

• A. Weight
• B. Amount of matter
• C. Velocity
• D. Friction

Answer: (B)

Mass tells us how much matter is in an object. It measures the amount of material something contains and stays the same no matter where the object is—Earth, the Moon, or space. This is why mass is different from weight, which is the gravitational pull on that mass and can change with location. Velocity describes how fast something moves and in what direction, not how much stuff it has. Friction is a force that resists motion between surfaces. So describing mass as the amount of matter is the best answer.