| A | B |
| Pure Substance | A type of matter with permanent composition |
| Element | All the atoms are alike |
| Compound | Two or more elements are combined in a fixed number |
| Molecule | Any two atoms atoms bonded together, could either be a element or compound |
| Mixture | Two or more substances |
| Heterogenous Mixture | A mixture where the different materials can be distinguished easily |
| Homogenous Mixture | A mixture that is evenly blended |
| Solution | A homogenous mixture that is a liquid or gas |
| Suspension | A heterogenous mixture that is a liquid or gas |
| Colloid | A heterogenous mixture that has particles big enough to be seen but not large enough to settle to the bottom |