Prentice Hall Science Explorer Chemical Building Blocks Chapter 2

25 terms by pksplc12

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Solid

has a definite shape and a definite volume

Crystals

particles that form a regular, repeating pattern

Crystalline Solids

solids that are made up of crystals and melt at a specific temperature

Amorphous Solids

particles that are not arranged in a regular pattern and does not melt at a distinct temperature

Liquid

has a definite volume but no shape of its own

Fluid

a substance that flows

Surface Tension

the result of an inward pull among the molecules of a liquid that brings the molecules on the surface closer together

Visocity

a liquid's resistance to flowing

Gas

changes volume very easily

Melting

the change in state from a solid to a liquid

Melting Point

the specific temperature at which melting occurs

Freezing

the change of state from a liquid to a solid

Vaporization

the change from a liquid to a gas

Evaporation

vaporization that takes place only on the surface of a liquid

Boiling

when a liquid changes to a gas below its surface as well as at the surface

Boiling Point

the temperature at which a liquid boils

Condensation

the opposite of vaporization; when particles in a gas lose enough thermal energy to form a liquid

Sublimation

when the surface particles of a solid gain enough energy that they form a gas. They do not pass through the liquid state as they form a gas

Pressure

the force of its outward push divided by the area of the walls of the container.

Boyle's Law

when the pressure of a gas at a constant temperature is increased, the volume of the gas decreases. When the pressure is decreased, the volume increases

Charles's Law

when the temperature of a gas is increased at constant pressure, its volume increases. When the temperature of a gas is descreased at a constant pressure, its volume decreases

Graph

a diagram that tells how two variables, or factors that change, are related.

Origin

the point (0,0)

Direcly Proportional

when a graph of two variables is a straight line passing through the origin

Vary Inversely

when a graph of two variables forms a curve that shows the relationship between pressure and voume known as Boyle's law

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