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Unit 3 Vocabulary--Solids, Liquids, and Gases
Martin Meylin Middle School Science Terms
24
Science
8th Grade
10/28/2011

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Term
Solid
Definition
A state of matter that has a definite shape and definite volume.
Term
Crystalline solid
Definition
A solid that is made up of crystals in which particles are arranged in a regular, repeating pattern.
Term
Amorphous solid
Definition
A solid made up of particles that are not arranged in a aregular pattern.
Term
liquid
Definition
A state of matter that has no definite shape but has a definite volume.
Term
fluid
Definition
A substance that can easily flow.
Term
surface tension
Definition
The result of an inward pull among the molecules of a liquid that brings the molecules on the surface closer together.
Term
viscosity
Definition
A liquid's resistance to flowing.
Term
gas
Definition
A state of matter that has no definite shape and no definite volume.
Term
melting
Definition
The change from a solid into a liquid state.
Term
metling point
Definition
The temperature at which a solid changes into a liquid.
Term
freezing
Definition
The change from a liquid into a solid state.
Term
vaporization
Definition
The change of state from a liquid to a gas.
Term
evaporation
Definition
The process that occurs when vaporization takes place only on the surface of a liquid.
Term
boiling
Definition
The change of state from a liquid to a gas.
Term
boiling point
Definition
The temperature at which a liquid changes to a gas.
Term
condensation
Definition
The change of state from a gas to a liquid.
Term
sublimation
Definition
The change of state directly from a solid to a gas.
Term
pressure
Definition
The force exerted on a surface divided by the total area over which the force is exerted.
Term
Boyle's law
Definition
A principle that describes the relationship between the pressure and volume of a gas at constant temperature.
Term
Charles' law
Definition
A principle that describes the relationship between the temperature and volume of a gas at constant volume.
Term
graph
Definition
A diagram that shows how two variables are related.
Term
origin
Definition
The (0,0) point on a line graph.
Term
directly proportional
Definition
A term used to describe the relationship between two variables whose graph is a straight line passing through the point (0,0).
Term
vary inversely
Definition
A term used to describe the relationship between two variables whose graph forms a curve that slopes downward.
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