Which property would stay the same if you change the amount of matter?

Which property would stay the same if you change the amount of matter?

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

Answer: (B)

Color is an intrinsic property of a substance, determined by how its atoms interact with light. This interaction—which wavelengths are absorbed, reflected, or transmitted—depends on the material’s composition, not on how much of the material you have. So changing the amount leaves the observed color the same, provided the substance remains the same substance. Mass and volume, on the other hand, scale with how much matter you possess. If you increase the amount, you increase the total mass and the total volume (assuming similar density), and if you decrease the amount, those quantities shrink accordingly. Temperature isn’t fixed by amount alone because it depends on energy transfer. If you add or remove heat, or change how much energy per particle is present, the temperature can change even if you’re using the same material. But the color stays the same because it’s tied to composition, not to quantity.

Color is an intrinsic property of a substance, determined by how its atoms interact with light. This interaction—which wavelengths are absorbed, reflected, or transmitted—depends on the material’s composition, not on how much of the material you have. So changing the amount leaves the observed color the same, provided the substance remains the same substance.

Mass and volume, on the other hand, scale with how much matter you possess. If you increase the amount, you increase the total mass and the total volume (assuming similar density), and if you decrease the amount, those quantities shrink accordingly.

Temperature isn’t fixed by amount alone because it depends on energy transfer. If you add or remove heat, or change how much energy per particle is present, the temperature can change even if you’re using the same material. But the color stays the same because it’s tied to composition, not to quantity.