| A | B |
|---|
| Matter | anything that has mass and takes up space |
| energy | ability to do work;ability to make things move |
| property | characteristic; used to describe a substance |
| characteristic | distinguishing trait, feature, or quality; property |
| states | phases of matter-solids, liquids, gases |
| solid | phase of matter with a definite shape and a definite volume |
| liquid | phase of matter with a definite volume, but no definite shape |
| gas | phase of matter with no definite volume or shape |
| water vapor | water in the gas state |
| evaporation (vaporization) | The change from a liquid state to a gas state (slowly from the surface)) |
| condensation | The change from a gas to a liquid state (cold causes) |
| freezing | The change from a liquid state to a solid state |
| melting | The change from a solid state to a liquid state |
| boiling (vaporization) | The change of a liquid to gas at boiling point |
| cloud | a collection of small water droplets or ice crystals suspended in the air, which forms when the air is cooled and condensation occurs |
| water vapor | water in its gas form (it is invisible) |
| cold molecules | Molecules move together |
| warm molecules | Molecules that spread out, fast moving |
| kinetic energy | the energy an object has due to its motion |
