| A | B |
|---|
| Matter | Anything that has mass and takes up space |
| Atom | A small particle that is the building block of matter |
| Substance | Matter with a composition that is always the same |
| Element | A substance that consists of just one type of atom |
| Compound | A type of substance containing atoms of two or more different elements chemically bonded together |
| Mixture | Matter that can vary in composition |
| Heterogeneous mixture | A type of mixture in which the individual substances are not evenly mixed |
| Homogeneous mixture | A type of mixture in which the individual substances are evenly mixed |
| Dissolve | To form a solution by mixing evenly |
