| A | B |
|---|
| changes of state are a _ change | physical |
| in order to change state, you must _ | add or remove energy |
| solid particles _ | vibrate--least energy |
| liquid particles _ | move freely |
| gas particles _ | fly--most energy |
| change from a solid to a liquid | melting |
| temperature for melting | melting point |
| in order to melt, particles must _ | move faster (add energy) |
| melting & boiling points are _ | characteristic properties |
| change from a liquid to a solid | freezing |
| melting point & freezing point | occur at the same temperature |
| adding energy to a substance | endothermic |
| removing energy to a substance | exothermic |
| change from a liquid to a gas | vaporization |
| vaporization on the surface of a liquid | evaporation |
| vaporization throughout a liquid | boiling |
| less pressure means _ | lower boiling point |
| change from a gas to a liquid | condensation |
| boiling point is the same as _ | condensation point |
| in order to freeze, particles must _ | slow down (remove energy) |
| in order to vaporize, particles must _ | speed up (add energy) |
| in order to condense, particles must _ | slow down (remove energy) |
| in order to sublime, particles must _ | speed up (add energy) |
| change from a solid directly to a gas | sublimation |
| solid carbon dioxide | dry ice |
| gaining/losing energy causes | temperature OR state change |
| substances stay the same temperature until | change of state is complete |
| sublimation examples | dry ice, snow disappearing during freezing temps |
| condensation examples | water on outside of glass, see your breath |
| vaporization examples | sweat, dew, or puddles disappear |
