| A | B |
| matter | anything that takes up space |
| physical property | anything you can observe about an object by using one or more of your senses |
| mass | the amount of matter in an object |
| volume | the amount of space that matter takes up |
| density | the mass of matter compared to its volume; how closely packed the particles of matter are together in an object |
| solid | a form of matter that has a volume and a shape that both stay the same |
| liquid | a form of matter that has a volume that stays the same but a shape that can change |
| gas | a form of matter that has no definite shape or volume |
| evaporation | the process by which liquid water changes into water vapor |
| condensation | the process by which water vapor changes into liquid water |