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has a definite shape and a definite volume


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


has a definite volume but no shape of its own


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


a liquid's resistance to flowing


changes volume very easily


the change in state from a solid to a liquid

Melting Point

the specific temperature at which melting occurs


the change of state from a liquid to a solid


the change from a liquid to a gas


vaporization that takes place only on the surface of a liquid


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


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


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


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


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


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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