Which property depends on the amount of matter?

• A. Colour
• B. Mass
• C. Temperature
• D. Density

Answer: (B)

Mass directly measures how much matter an object contains. If you add more material, the mass increases; remove material, and mass decreases. That link to “how much stuff” is what makes it depend on the amount of matter.

Color is about how the material interacts with light, not how much material you have. Temperature describes how fast the particles are moving and can be the same for different amounts of substance at the same energy conditions. Density is a ratio of mass to volume, and for a given material under the same conditions it stays the same regardless of how much of it you have, so it doesn’t track the amount of matter itself.