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Physical Science
Term | Definition |
---|---|
Atom | the basic particle from which all elements are made;the smallest particle of an element that has the properties of that element. |
Boil | the change in state from liquid to a gas. |
Condense | the change in state from a gas to a liquid. |
Evaporate | the process by which molecules at the surface of a liquid absorb enough energy to change to gas. |
Freeze | the temperature at which a solid 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 definite 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 or solid at room temperature |
Conduction | the transfer of thermal energy from 1 object to another |
Convection | the transfer of thermal energy by the movement of fluid |
Radiation | the transfer of energy by electromagnetic waves |