| Term | Definition |
| matter | that which has mass and occupies space |
| mass | the amount of matter in an object |
| solubility | the ability of one substance to dissolve in another at a given temperature and pressure |
| freezing point | the temperature at which a substance changes from a liquid to a solid |
| boiling point | the temperature at which a substance changes from a liquid to a gas |
| melting point | the temperature at which a substance changes from a solid to a liquid |
| mixture | a blend of two or more kinds of matter, each of which retains its own identity and properties |
| solution | a mixture in which one substance is dissolved in another |
| physical property | a characteristic that can be observed or measured without changing the identity of the substance |
| solid | of definite shape and volume |
| gas | matter that does not have a definite shape or volume |
| liquid | matter that has a definite volume but no definite shape |
| weight | A measure of the force of gravity on an object |