| A | B |
|---|
| matter | anything that has mass and takes up space |
| solid | has a definite shape and definite volume |
| melting | this is what happens when a solid changes to a liquid |
| energy | heat that is added or removed to change the state of matter |
| condensation | when steam or vapor becomes a liquid as heat is removed |
| freezing | this is what happens when a liquid changes to a solid |
| evaporation | liquid changes to a gas when heat is added |
| sublimation | solid (dry ice) goes directly to gas |
| gas | has an indefinite shape and an indefinite volume |
| liquid | has an indefinite shape and an definite volume |
| expands | mercury in a thermometer ___ when it is heated. |
| contracts | mercury in a thermometer ___ when it is chilled. |
