| A | B |
|---|
| chemical change | change in matter that results in new substances being formed |
| chemical reaction | specific example of one or more chemical changes |
| physical change | change in size, shape, or state of matter with no new matter being formed |
| catalyst | a substance that speeds up a chemical reaction but is not changed by the reaction |
| conservation of matter | the amount of matter remains the same during a chemical or physical change |
| examples of physical changes | cutting, sanding, of drilling wood |
| signs of a chemical change | color change, release of energy as heat or light |
| example of physical change | ice melting |
| example of chemical change | baking muffin batter |
| salt | speeds up rusting |
| how to speed up chemical reactions | raise the temperature or add a catalyst |
| volume | this increases when water freezes |
