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Unit 1 Phase Change

TermDefinition
solid A state of matter that has a definite shape and definite volume. The particles vibrate in place due to a strong attractive force
liquid A state of matter that has no definite shape but has a definite volume. The particles slip past each other due to a weaker attractive force, which allows them to take the shape of their container.
gas A state of matter with no definite shape or volume. The particles have a very weak attractive force, and therefore spread out to fill their container.
condensation The change of a substance from a gas to a liquid
evaporation The vaporization (liquid to gas) of a substance from the surface of the liquid at all temperatures. Clue: no bubbles
melting The change of a substance from a solid to a liquid
freezing The change of a substance from a liquid to a solid
kinetic energy The energy that an object has because it is moving
molecular attraction A pull between two molecules that is always the same for a substance
phase A noticeably different form or state of the same substance.
temperature A measure of the average kinetic energy of the molecules of a substance.
sublimation The change in phase of a substance directly from a solid to a gas.
deposition The change in phase of a substance directly from a gas to a solid.
plasma The state of matter that is made up of very hot gas, with electrically charged particles with the most energy.
viscosity A measurement of a liquid’s resistance to flow.
surface tension The elastic force acting on the surface of a liquid caused by the attractive forces of the molecules at the surface.
vapor The gas state of a substance that is normally a solid or liquid at room temperature.
Thermal Energy The sum of the kinetic energy and the potential energy of the particles that make up an object.
Boiling The vaporization (liquid to gas) of a substance from inside the substance at a specific temperature. Clue: bubbles
Created by: RWare
 

 



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