| A | B |
|---|
| exothermic reaction | a reaction that releases energy in the form of heat or lightenergy |
| endothermic reaction | a reaction which absorbs energy in order to complete a reaction |
| activation energy | the minimum amount of energy needed to start a chemical reaction |
| concentration | the amount of one material in a given volume of another material |
| catalyst | a material that increases the rate of a reaction by lowering the activation energy |
| enzymes | cells in your body contain these biological catalysts |
| inhibitor | a material used to decrease the rate of reaction |
| combustion | a rapid reaction between oxygen and a substance called fuel |
| fuel | material that releases energy when it burns |
| fuel, oxygen, heat | three things necessary to maintain a fire |
| products temperature goes down | endothermic |
| products temperature goes up | exothermic |
