Pre-IB Grade 9 Science Practice Exam

When we think about properties, some depend on how much substance you have (extensive properties) and some do not (intensive properties). Mass and volume grow or shrink with the amount of matter. But color is an intrinsic property of the material, determined by its composition and how it interacts with light, so it stays the same regardless of how much you have—as long as the substance is pure and conditions are the same. That’s why color remains unchanged when you change the amount of matter.