| A | B |
|---|
| solid | A state of matter that has a definte volume and a definite shape. |
| crystalline solid | A substance 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 defintie shape but has a definte volume. |
| fluid | Any substance that can flow. |
| viscosity | The resistance of a liquid of flowing. |
| gas | A state of matter with no definite shape or volume. |
| temperature | A measure of the average energy of the particles of a substance. |
| pressure | The force pushing on a surface divided by the area of that surface. |
| Boyle's law | The relationship between the pressure and volume of a gas; when volume increases, pressure decreases. |
| Charles's law | The relationship between the temperture and volume of a gas; when temperature increases, volume increases. |
| graph | A diagram that shows how two variables are related. |
| directly proportional | A term used to describe the relationship between two variables whose graph is a straight line passing through the point (0,0). |
| vary inversely | A term used to describe the relationship between two variables whose graph forms a curve that slopes downward. |
| thermal energy | The total energy of a substance's particles due to their movement or vibration. |
| chemical energy | A form of energy that comes from chemical bonds. |
| law of conservation of energy | The principle that the total amount of energy remains the same during phsical or chemical change. |
| melting | The change in state from a solid to a liquid. |
| freezing | The change in state from liquid to a solid. |
| vaporization | The change of state from a liquid to a gas. |
| evaporation | The process that occurs when vaporization takes place only on the surface of a liquid. |
| boiling | The process that occurs when vaporization takes place inside a liquid as well as on the surface. |
| condensation | The change of state from a gas to a liquid. |
| sublimation | The change in state from a solid directly to a gas without passing through the liquid state. |
| chemical reaction | A process in which substances undergo chemical changes, forming new substances with different properties. |
