| A | B |
| solid | phase of matter having a definite shape and a definite volume |
| liquid | phase of matter having no definite shape but having a definite volume |
| gas | phase of matter having no definite shape and no definite volume |
| plasma | phase of matter having very high energy |
| melting | change of a solid to a liquid |
| freezing | change of a liquid to a solid |
| vaporization | change of a liquid to a gas |
| boiling | particles inside a liquid change to a gas |
| condensation | change of a gas to a liquid |
| sublimation | change of a solid to a gas |