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Physical Science
Term | Definition |
---|---|
Atom | the basic particle from which all elements are made |
Boil | the change in state from a 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 a gas |
Freeze | the temperature at which a 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 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 solid, liquid, or gas |
Phase change | a change from one state 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 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 |