| A | B |
|---|
| Characteristic property | a quality of a substance that never changes and can be used to identify the substance |
| Boiling point | the temperature at which a substance changes from a liquid to a gas |
| Melting point | the temperature at which a substance changes from a solid to a liquid |
| Physical Change | change in a substance that does not change its identity |
| Chemical Change | a change in which one or more substance combine or break apart to form new substances |
| Mixture | two or more substances that are mixed together but not chemically combined |
| Solution | a very well mixed mixture |
| Pure Substance | a substance made of only one kind of matter and having definite properties |
| Element | a substance that can not be broken down into other substances by chemical or physical means |
| Compound | a substance made of two or more elements chemically combined |
| Atom | the smallest particle of an element |
| Molecule | a combination of two or more atoms |
