| A | B |
| condensation | change from gas to liquid state |
| sublimation | change from solid to gas state |
| evaporation | change from liquid to gas state on the surface |
| vaporization | change from liquid to gas state |
| freezing | change from liquid to solid state |
| melting | change from solid to liquid state |
| gas | state with no definite shape or volume |
| solid | state with a definite shape and definite volume |
| liquid | state with a defintite volume but no definite shape |
| boiling | change from liquid to gas on and under the surface |
| pressure | force divided by area |
| boiling point | temperature at which a liquid changes into a gas |
| melting point | temperature at which a solid turns into a liquid |
| fluid | a substance that flows |
| viscosity | resistance of a substance to flowing |
| surface tension | an inward pull among the molecules of a liquid that brings the molecules on the surface closer together; causes the surface to act as if it has a thin skin |
| amorphous solid | solid whose particles are not arranged in a regular, repeating pattern |
| crystalline solid | solid whose particles are arranged in a regular, repeating pattern |
| Boyle's Law | relationship of the pressure in a gas to its volume when kept at a constant temperature |
| Charles' Law | relationship of the volume of a gas to its temperature when kept at a constant pressure |
| origin | the (0,0) point on a line graph |
| x-axis | horizontal axis on a line graph |
| y-axis | vertical axis on a line graph |
| directly proportional | relationship between two variables whose graph is a straight line |
| vary inversely | relationship between two variables whose graph is a curve that slopes downward |