| A | B |
|---|
| Physical change | material keeps identity but can include changes in position size shape volume and phase of matter |
| Chemical change | occurs when one substance or kind of matter changes into another completely different kind of matter with different properties |
| Combustion | chemical process also known as burning |
| Reactant | substance used in a reaction |
| Product | substance made during a chemical reaction |
| Chemical equation | a special kind of sentence that shows what happens during a chemical reaction |
| Polymer | a large molecule made of many identical smaller units connected together |
