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Physical Science Chapter 3 State of Matter

Physical Science Concepts in Action w/ Earth and Space Science

AB
solidThe state of matter in which materials have a definite shape and a definite volume.
liquidThe state of matter in which a material has a definite volume but not a definite shape.
gasThe state of matter in which a material has neither a definite shape nor a definite volume.
kinetic energyThe energy that an object has due to its motion.
pressureThe result of force distributed over an area.
absolute zeroThis temperature is equal to 0K on the Kelvin terperature scale.
Charles's lawStates that the volume of a gas is directly proportional to its temperature in kelvins if the pressure and the number of particle of the gas are constant.
Boyle's lawStates that the volume of a gas is inversely proportional to its pressure if the temperature and the number of particles are constant.
phase changeThe reversible physical change that occurs when a substance changes from one state of matter to another.
endothermicA type of change where the system absorbs energy from its surroundings.
heat of fusionThe amount of energy a substance must absorb in order to change from a solid to a liquid
exothermicA description of a change in which a system releases energy to its surroundings.
vaporizationThe phase change in which a substance changes from a liquid to a gas.
heat of vaporizationThe energy a substance must absorb in order to change from a liquid to a gas.
evaporationThe process that changes a substance from a liquid to a gas at temperatures below the substance's boiling point.
vapor pressureThe pressure caused by collisions of particles in a vapor with the walls of a container.
condensationThe phase change in which a substance changes from a gas or vapor to a liquid.
sublimationThe phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first.
depositionThe phase change in which a gas or vapor changes directly into a solid without first changing into a liquid.


7TH AND 8TH GRADE
Geraldine School

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