| A | B |
|---|
| Pure Sudstance | A substance made of only one kind of matter and having definite properties |
| Physical changes | A change in a substance that doesn't change it's identity; for example change of state |
| Melting point | The temperature which a substance changes from a solid to a liquid |
| Boiling point | The temperature at which a substance changes from a liquid to a gas |
| Chemical change | A changes in which one or more substances combind or break apart to form a new substance |
| Chemical activity | A characteristic property of a substance that indicates it's ability to undergo a specific chemical change |
| Elements | A substance that can't be brocken down into other substances by chemical or physical means |
| Characteristic properties | A quality of a substance that never changes and can be used to identify the substance |
| Mixture | Two or more substances that are mixed together but not chemicaly combiend |
| Compound | A substance made of two or more chemicals chemically combind |
| International system of units | the system of units |
