| A | B |
|---|
| Solid | Rigid; has a fixed shape and volume |
| Liquid | Definite volume but takes the shape of its container |
| Gas | No fixed volume or its container. Can never be liquid at normal temperatures or pressures. |
| Vapor | Can return to a liquid when they cool to room temperature. Liquids that have undergone a physical change. |
| Physical change | changes the form without forming a new substance |
| chemical change | a change in a substance’s chemical composition, creates new substances with different properties |
| Oxidation | Chemical reaction that combines a substance with oxygen to produce an oxide. |
| Oxidation-Reduction | Redox |
| Oxidizing Agent | A substance that releases oxygen |
| Exothermic reaction | a chemical reaction when heat is released |
| combustion | Rapid oxidation of a substance accompanied by the production of heat and light |
