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physical science 1
| Term | Definition |
|---|---|
| Atom | The basic particle from which all elements ;the smallest particle of an element that has the properties of that element. |
| boil | The change is state from a liquid to a gas. |
| Condense | The change is state from a gas to a liquid. |
| Evaporate | The process by witch molecules at the surface of a liquid absorb enough energy to change a gas. |
| freeze | the temperature at which liquid freezes. |
| Gas | A state of matter with no definite shape or volume. |
| Inert | having little or no ability to react. |
| Kinetic energy | Energy that an object has due to its motion. |
| Liquid | A state of matter that has no defined shape but has a definite volume. |
| Matter | Anything that has mass and takes up space. |
| Melt | The temperature at which a substance changes from a solid to a liquid. |
| Molecule | A neutral group of two or more atoms held together by covalent bonds. |
| Particle | Smallest possible unit of matter |
| Particle Motion | Ways in which atoms, ions, or molecules move |
| Phase | A physically distinctive form of matter, such as a solid, liquid or gas |
| Phase Change | A change from one state(solid or liquid or gas) to another without a change in chemical composition. |
| Pressure | The physical force exerted on an object. |
| Pure substance | A substance made of only one kind of matter and having definite properties. |
| Solid | A state of matter that has a definite shape and volume. |
| System | a group of parts that work together as a whole. |
| Temperature | A measure of the average energy of motion of the particles of a substance. |
| Thermal energy | The total kinetic and potential energy of all the particles of an object. |
| Vapor | Gaseous state of a substance that is a liquid of a solid at room temperature. |
| Conduction | The transfer of thermal energy from one object to another. |
| Convection | The transfer of thermal energy by the movement of fluid. |
| Radiation | The transfer of energy by electromagnetic waves. |