| A | B |
|---|
| chemical reaction | changes one set of chemicals into another |
| reactants | elements or compounds that enter into a chemical reaction |
| products | elements or compounds made in a chemical reaction |
| activation energy | energy that is needed to start a reaction |
| catalyst | substance that speeds up the rate of a chemical reaction |
| enzyme | proteins that act as biological catalysts |
| substrate | reactants in an enzyme reaction; what the enzyme works on |
| -ase | suffix used to name enzymes |
