| A | B |
|---|
| atom | basic unit of all matter |
| electron | travels around the nucleus |
| nucleus | the central part of an atom |
| density | compates mass with volume, thickness |
| solid | matter that has a definate shape |
| liquid | matter that can be poured |
| gas | matter that has no definate shape |
| melting | when a solid turns to a liquid |
| boiling | when a liquid turns to a gas |
| mixture | the physical combining of 2 or more materials |
| solution | forms when one substance dissolves in another |
| solute | a substance that dissolves |
| solvent | a substance that does the dissolving |
| suspension | when particles do not dissolve in a substance |
| chemical change | a change in matter in which a new form of matter is created |
| heat | this form of energy can speed up dissolving |
| stirring | this action can speed up dissolving |
| evaporation | when a liquid "dries up" or turns to a gas |
| compounds | these are new substances that form when different elements combine |
| molecule | these are made of 2 or more atoms |
