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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 q liquid to a gas |
Condense | the change in state from a gas to a liquid |
Evaporate | the process of which 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 |
Insert | 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 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 (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 only made of 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 |
Thermal Energy | the total kinetic and potential energy of all the particles of an object |
Vapor | gaseous state of substance that is a liquid or a solid at a room temperature |
Conduction | the transfer of thermal energy from one object to another |
Convection | the transfer of thermal energy by movement of fluid |
Radiation | the transfer of energy by electromagnetic waves |
Temperature | a measure of the average energy of motion of the particles of a substance |