| A | B |
| atom | the building block of matter |
| boiling | the process where the particles inside a liquid changes to a gas by adding heat |
| chemical property | property that describes how a substance changes into a new substance |
| condensation | change of a gas to a liquid by losing heat |
| crystal | a solid in which the particles are arranged in a regular, repeating pattern |
| density | mass per unit volume |
| evaporation | process that takes place at the surface of a liquid, where the liquid changes to a gas by adding heat |
| freezing | change of a liquid into a solid by losing heat |
| gas | phase in which matter has no definite shape or volume |
| heterogeneous mixture | a mixture that does not appear to be the same throughout |
| homogeneous mixture | a mixture that appears the same throughout |
| insoluble | unable to be dissolved |
| liquid | phase of matter with no definite shape but with definite volume |
| mass | the amount of matter in an object |
| matter | anything that has mass and volume |
| melting | change of a solid to a liquid by adding heat |
| mixture | matter that consists of two or more substances physically combined |
| physical property | characteristic of matter that is observed without changing the identity of the substance |
| solid | phase in which matter has a definite shape and definite volume |
| solubility | the amount of a solute that can be dissolved in a given amount of a solvent |
| soluble | can be dissolved |
| solute | the substance that gets dissolved |
| solvent | the substance that does the dissolving |
| sublimation | change of a solid directly into a gas by adding heat |
| vaporization | change of a liquid to a gas by adding heat |
| volume | the amount of space an object takes up |