| A | B |
| SOLID | A state of matter that has definite shape and a definite volume. |
| CRYSTALLINE SOLID | A solid that is made up of crystals in which particles are arranged in a regular, repeating pattern. |
| AMORPHOUS SOLID | A solid made up of particles that are not arranged in a regular pattern. |
| LIQUID | A state of matter that has no definite shape but has a definite volume. |
| FLUID | Any substance that can flow. |
| SURFACE TENSION | The result of 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. |
| VISCOSITY | A liquid's resistance to flowing. |
| GAS | A state of matter with no definite shape or volume. |
| PRESSURE | The force pushing on a surface divided by the area of that surface. |