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# Chapter 8

### States of Matter

TermDefinition
States of matter the physical forms of matter, which include solid, liquid, and gas
Solid the state of matter in which the volume and shape of a substance are fixed
Liquid the state of matter that has a definite volume but not a definite shape
Surface tension the force that acts on the surface of a liquid and that tends to minimize the area of the surface
Viscosity the resistance of a gas or liquid to flow
Gas a form of matter that does not have a definite volume or shape
Temperature a measure of how hot (or cold) something is, specifically, a measurement of the movement of particles
Volume a measure of the size of a body or region in three dimensional space
Pressure the amount of force exerted per unit area of a surface
Boyle's Law the law that states that the volume of a gas is inversely proportional to the pressure of a gas when temperature is constant
Charles's Law the law that states that the volume of a gas is directly proportional to the temperature of a gas when pressure is constant
Change of state the change of a substance from one physical state to another
Melting the change of state in which a solid becomes a liquid by adding energy
Evaporation the change of a substance from a liquid to a gas
Boiling the conversion of a liquid to a vapor when the vapor pressure of the liquid equals the atmospheric pressure
Condensation the change of state from a gas to a liquid
Sublimation the process in which a solid changes directly into a gas
Created by: j1curry