click below
click below
Normal Size Small Size show me how
Physical Science 1
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 gas |
Condense | the change in state from gas to 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 a definite volume |
Matter | anything that has mass or takes up space |
Melt | the temperature at which a substance changes from a solid to liquid |
Molecule | a neutral group of two or more atoms held together by covalent bonds |
Particle | smallest possible unit o matter |
Particle Motion | ways in which atoms, ions, or molecules move |
Phase | a physically distinctive from 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 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 |