| A | B |
|---|
| chemical reaction | process that produces chemical change, resulting in new substances that have properties different from those of the original substances |
| reactant | substance that exists before a chemical reaction begins |
| product | substance that forms as a result of a chemical reaction |
| chemical equation | shorthand form for writing what reactants are used and what products are formed in a chemical reaction |
| endothermic reaction | chemical reaction in which heat energy is absorbed |
| exothermic reaction | chemical reaction in which heat energy is released |
| activation energy | minimum amount of energy needed to start a chemical reaction |
| rate of reaction | measure of how fast a chemical reaction occurs |
| concentration | describes how much solute is present in a solution compared to the amount of solvent |
| inhibitor | substance that slows down a chemical reaction; making the formation of a certain amount of product take longer |
| catalyst | substance that speeds up a chemical reaction but is not used up itself or permanently changed |
| enzyme | catalysts that are large protein molecules which speed up reactions needed for your cells to work properly |
