| A | B |
| Hydrocarbons | Molecules cantaining ONLY carbon and hydrogen |
| Saturated hydrocarbon | Each carbon atom contains four bonded atoms |
| Unsaturated hydrocarbon | Carbon atoms in this hyrocarbon contain a double or triple bond |
| Aromatic compound | Contains one or more benzene rings |
| Functional group | A combination of atoms that behave as a unit |
| Alcohols | A hydroxyl group is bonded to a saturated carbon |
| Polymer | Very long chain molecules which contain repeating units |
| Organic chemistry | The study of carbon cantaining compounds |