| A | B |
|---|
| Kinetic Energy | The explanation of the behavior of molecules in matter; states that all matter is made up of particles that collide without loosing energy. |
| Melting Point | Temperature at which a solid begins to liquefy. |
| Heat of Fusion | Amount of energy required to change a substance from the solid phase to the liquid phase. |
| Boiling Point | The temperature at which the pressure of the vapor in the liquid is equal to the external pressure acting on the surface of the liquid. |
| Heat of Vaporization | The amount of energy required for the liquid at its boiling point to become a gas. |
| Diffusion | Spreading of particles throughout a given volume until they are uniformly distributed. |
| Plasma | Matter consisting of positively and negatively charged particles. |
| Thermal Expansion | Increase in the size of a substance when the temperature is increased. |
| Buoyancy | Ability of a fluid--a liquid or a gas-- to exert an upward force on an object immersed in the fluid. |
| Pressure | Amount of force exerted per unit area; SI unit is the pascal (Pa) |
| Viscosity | A fluid's resistance to flow. |
| Pascal | SI unit of pressure |
