| A | B |
| heterogeneous | not the same throughout |
| matter | has mass and occupies space |
| element | cannot be separated into simpler substances |
| homogeneous | the same throughout |
| compound | atoms of different elements chemically combined |
| solid | has a fixed shape and volume |
| solution | a homogeneous mixture |
| physical change | composition of a substance is not affected |
| liquid | has a fixed volume but assumes the shape of its container |
| alloy | mixture with metallic properties |
| chemical properties | ability to form new substances |
| gas | no fixed volume or shape |
| chemical change | a new substance is formed |
| physical properties | inherent characteristics of a substance |