| 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 | a change in a substance that does not change its identity (example: a change of state) |
| chemical change | a change in which one or more substances combine or break apart to form new substances |
| chemical activity | a characteristic property of a substance that indicates its ability to undergo a specific chemical change |
| 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 cannot be broken down into other substances by chemical or physical means |
| compound | a substance made of two or more elements chemically combined |
