| A | B |
| matter | anything that has mass and takes up space |
| mass | amount of matter in a substance (thing) |
| volume | how much space a substance takes up |
| density | mass / volume = |
| solid | It has a definite shape and volume. |
| element | a pure, basic substance that is made up of only one type of atom. It can't be broken down any further. |
| liquid | It has a definite volume, but takes the shape of its container. |
| gas | It has no definite shape or volume. It takes the shape and volume of its container. |
| physical change | a change from one form to another without changing into something different or new. |
| pure substance | It has just one element or one compound with nothing mixed in. (gold, distilled water ..) |
| mixture | 2 or more than 2 things mix together (salt water..) |
| chemical change | a change that makes a new substance |