Which quantity remains constant for a given object regardless of location in the universe?

• A. Mass
• B. Weight
• C. Volume
• D. Density

Answer: (A)

The key idea is that mass is an intrinsic property of matter that does not change with location. A given object's mass stays the same whether it's here on Earth, on the Moon, or anywhere else in the universe, because it simply reflects how much matter is present. Weight, on the other hand, depends on the local gravitational field, since weight equals mass times gravity, so it varies with location. Volume can change with temperature or pressure, and density depends on both mass and volume and can also vary with conditions. So mass is the quantity that remains constant for a given object regardless of where you are.