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Chapter 3: States of Matter
Physical Science
16
Science
8th Grade
11/29/2010

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Term
States Of Matter
Definition
The physical forms in which a substance can exist; states include Solid, liquid, gas, plasma.
Term
Solid
Definition
The state in which matter has a definite shape and volume.
Term
Liquid
Definition
The state in which matter takes the shape of it's container and has a definite volume.
Term
Gas
Definition
The state in which matter changes in both shape and volume.
Term
Pressure
Definition
The amount of force exerted on a given area; Represented in Pascals.
Term
Boyle's Law
Definition
The law that states that for a fixed amount of gas at a constant temperature, the volume of a gas increases at it's pressure decreases.
Term
Charlie's Law
Definition
The law that states that for a fixed amount of gas at a constant pressure, the volume of the gas increases as it's temperature increases.
Term
Plasma
Definition
The state of matter that does not have a definite shape or volume and whose particles have broken apart; Plasma is composed of electrons and positively charged ions.
Term
Change of State
Definition
The conversion of a substance from one physical state to another.
Term
Melting
Definition
The change of state from a solid to a liquid.
Term
Freezing
Definition
The change of state from a liquid to a solid.
Term
Vaporization
Definition
The change of state from a liquid to a gas; includes boiling and evaporation.
Term
Boiling
Definition
Vaporization that occurs throughout a liquid.
Term
Evaporation
Definition
Vaporization that occurs at the surface of the liquid below it's boiling point.
Term
Condensation
Definition
The change of a state from a gas to a liquid.
Term
Sublimation
Definition
The change of state from a solid directly to a gas.
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