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Matter
Ch.15 Classification of Matter
Term | Definition |
---|---|
chemical change | when one substance changes into another substance |
chemical property | characteristics of a substance indicating that it can change chemically (flammability or light sensitivity) |
colloid | heterogeneous mixture with large particles that never settle |
compound | pure substance with two or more elements combined in fixed proportion |
distillation | a physical change; used for separating a mixture by evaporating a liquid and condensing its vapor |
element | a pure substance with atoms that are all alike |
heterogeneous | mixture of different and easily distinguishable materials |
homogeneous | contains two or more gaseous, liquid, or solid substances blended together evenly; |
law of conservation of mass | masses of all substances present before a chemical change equals the mass of all substances after the change. |
physical change | change in a substance's size, shape, or state of matter |
physical property | characteristics of a substance that describes how it can be used to separate mixtures |
solution | a homogeneous mixture (blended throughout) |
substance | either an element or a compound |
suspension | a heterogeneous mixture containing a liquid in which visible particles settle over time |
Tyndall effect | colloids scattering light |