| Term | Definition |
| physical | chemical or physical change? melting butter |
| physical | chemical or physical change? dissolving sugar |
| chemical property | characteristics of a substance indicating that it change change chemically; i.e. flammability |
| compound | a substance in which two or more substances that can be easily separated by physical means |
| solution | a homogenous mixture of particles so small that they cannot be seen with a microscope and will never settle to the bottom of a container |
| heterogenous (mixture) | a mixture in which different materials can be easily distinguished |