| A | B |
| Flammability | A material's ability to burn in the presence of oxygen |
| Oxidation | A chemical change in which a substance combines with oxygen, as when iron oxidizes, forming rust or other residue |
| reactivity to acids | how easily a substance chemically reacts with acids |
| pH (parts Hydrogen) | the acidity of a substance (0-14pH) |
| Toxicity | The condition of producing adverse bodily effects due to poisonous qualities. |
| indicator | A compound that changes color in the presence of an acid or a base |
| precipitate | A solid that forms from a solution during a chemical reaction. |
| Decomposition | A chemical reaction that breaks down compounds into simpler products. |
| rotting | decaying |
| spoiling | the process of rotting or decaying, chemical change |
| Digestion | Breakdown of food substances into simpler forms that can be absorbed and used |
| surface area | The measurement of the outer surface of an object. |
| Concentration | A measurement of how much solute exists within a certain volume of solvent |
| catalyst | substance that speeds up the rate of a chemical reaction |
| Enzyme | A type of protein that speeds up a chemical reaction in a living thing |
| Solute | A substance that is dissolved in a solution. |
| Solvent | A liquid substance capable of dissolving other substances |
| Inhibitor | A substance that slows down or stops a chemical reaction |