| A | B |
|---|
| Matter | Anything that has mass and takes up space. |
| Atoms | The smallest particle that makes up a given type of matter. |
| Neutron | An electrically neutral particle in the nucleus of an atom. |
| Electron | A negatively charged particle that travels around the nucleus of an atom. |
| Proton | A positively charged particle in the nucleus of an atom. |
| Kinetic Theory of Matter | The idea that the particles of all matter are in constant random motion. |
| Brownian Motion | The constant random motion of tiny particles of matter. |
| Temperature | An indirect measure of the average kinetic energy of the particles that make up a material. |
| Heat | The transfer of energy from matter at a higher temperature to matter at a lower temperature. |
| Absolute Zero | -273.15 C the temperature at which the particles of matter would cease to move. |
| Solid | This state of matter cannot change shape or volume.(molecules tightly packed together) |
| Liquid | This state of matter can change its shape but not its volume. |
| Gas | A form of matter that can change both its shape and volume. |
| Quark | A newly discovered particle of matter that makes up protons and neutrons. |
| Crystalline Solid | The arrangement of particles in a solid in repeating geometric patterns. |
| Non-Crystalline Solid | A solid whose molecules are randomly arranged. |
| Kinetic Energy | The energy of moving particles that increases as temperature increases. |
| Evaporation | The fastest moving particle escape from a liquid to form a gas. |
| Condensation | The slowest moving particles in a gas slow down and form a liquid. |
| Melting Point | The temperature at which a solid turns into a liquid. |
| Boiling Point | The temperature at which a liquid turns into a gas. |
| Freezing Point | The temperature at which a liquid turns into a solid. |
| Heat of Vaporization | The temperature required to change 1 Kg of a liquid to a gas. |
| Heat of Fusion | The temperature required to change 1Kg of a solid to a liquid. |
| Surface Tension | Tension caused by the cohesive forces between molecules. |
| Molecule | The combination of two or more atoms which are joined chemically. |
