| A | B |
| Catalyst | A substance that changes the rate of chemical reactions without being consumed |
| Enzyme | /a protein that speed up a specific biochemical reaction |
| Activation energy | The minumum energy required to overcome the energy barrier to allow a reaction to proceed. |
| Broken bonds | The first step in most chemical reactions |
| Heat | May supply the energy required to break chemical bonds |
| Catalysts that slow a reaction | Inhibitors |
| Synthesis reaction | Hydrogen and oxygen combine to form water is an example |
| Decomposition reaction | Producing oxygen from water is an example |
| Combustion | Products are carbon dioxide and water |
| Acid-base reaction | Products are salt and water |
| Redox reaction | Involves the transfer of electrons |
| Equilibrium | condition where the reaction rates of the forward and reverse reaction are equal |