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Science Chapter 3 Quiz
Vocabulary
23
Science
8th Grade
10/09/2010

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Term
Solid
Definition
Something that has a definite shape and volume. Particles in a solid are packed very closely together so they can only vibrate.
Term
Crystalline solid
Definition
Solids that are made up of crystals. When a crystalline solid is heated, it melts at a specific temperature. The particles form a regular, repeating pattern.
Term
Amorphous solid
Definition
Solids where the particles are not arranged in a regular pattern. An amorphous solid does not melt at a distinct temperature. Instead, it becomes softer and softer or change into other substances.
Term
Liquid
Definition
Something that has a definite volume but no shape on its own. Particles in a liquid are packed close together, but can collide and move past one another, allowing liquids to flow.
Term
Fluid
Definition
A substance that flows
Term
Surface tension
Definition
the result of 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
Something that can change volume easily. The particles move about freely and collide frequently.
Term
Melting
Definition
the change in state from a solid to a liquid
Term
Melting Point
Definition
a characteristic temperature where melting occurs
Term
Freezing
Definition
the change from a liquid to a solid
Term
Vaporization
Definition
the change from a liquid to a gas
Term
Evaporation
Definition
Vaporization that takes place only on the surface of a liquid
Term
Boiling
Definition
the change from a liquid to a gas
Term
Boiling point
Definition
the temperature at which a liquid boils
Term
Condensation
Definition
the change in state from a gas to a liquid; the reverse of vaporization
Term
Sublimation
Definition
the change from a solid directly to a gas
Term
Pressure
Definition
The force of its outward push divided by the area of the walls of the container
Term
Charles's law
Definition
When the temperature of a gas is increased at constant pressure, its volume increases. When the temperature of a gas is decreased at constant pressure, its volume decreases
Term
Directly proportional
Definition
when a graph of two variables is a straight line passing through the origin
Term
Boyle's law
Definition
When the pressure of a gas at constant temperature is increased, the volume decreases. When the pressure decreases, the volume increases.
Term
Inversely proportional
Definition
when the product of two variables is constant
Term
A relationship between temperature and pressure
Definition
If the temperature of a gas at constant volume is increased, the pressure of the gas increases. When the temperature decreases, the pressure of the gas decreases.
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