| A | B |
|---|
| mass | the amount of matter in a substance |
| density | the amount of matter in a given volume |
| Color Change | a chemical reaction has occured |
| volume | the amount of space a substance occupies |
| solid | fixed volume, fixed shape |
| liquid | fixed volume, variable shape |
| gas | indefinite volume and shape |
| evaporation | physical change from liquid to gas |
| condensation | physical change from gas to liquid |
| exothermic | to give off energy |
| endothermic | to take in energy |
| Chemical reaction | a process in which atoms rearrange and form new substances |
| energy | every chemical reaction contains a change in _____. |
| Temperature change | one sign that a chemical reaction has occured |
| Emission of Light | one sign that a chemical reaction has occured |
| Formation of a gas | one sign that a chemical reaction has occured |
