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chapter 15 vocab
| Term | Definition |
|---|---|
| substance | a type of matter with a fixed composition |
| element | if all the atoms in a substance have the same identity, that substance is an |
| compound | a substance in which the atoms of two or more elements are combined in a fixed proportion |
| heterogeneous mixture | a mixture in which different materials can be distinguished easily |
| homogeneous mixture | contains two or more gaseous, liquid, or solid substances blended evenly throughout |
| solution | a homogeneous mixture of particles so small that they cannot be seen with a microscope and will never settle to the bottom of their container |
| suspension | a heterogeneous mixture containing a liquid in which visible particles settle |
| physical property | any characteristic of a material that you can observe without changing the identity of the substances that make up the material |
| physical change | a change in size, shape, or state of matter |
| distillation | the process for separating substances in a mixture by evaporating a liquid and re-condensing its vapor |
| chemical property | a characteristic of a substance that indicates whether it can undergo a certain chemical change |
| chemical change | a change of one substance to another |
| law of conservation of mass | the mass of all substances that are present before a chemical change equals the mass of all the substances that remain after the change |
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caitling76
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