States of Matter

Solid

A form of matter that has a definite shape and volume

Liquid

A state of matter that has no definite shape but has a definite volume.

Gas

A state of matter with no definite shape or volume

Molecules in a solid

Slow speed and very dense

Molecules in a liquid

Average speed and average density

Molecules in a gas

Fast speed and less dense

Melting

The change in state from a solid to a liquid

Freezing

The change of state from a liquid to a solid

Deposition

A change of state from gas to solid without becoming liquid

Sublimation

A change directly from a solid to a gas without becoming liquid

Condensation

The change of state from a gas to a liquid

Evaporation

The change of state from a liquid to a gas

Processes where energy is GAINED

Evaporation, Sublimation, Sublimation

Processes where energy is LOST

Condensation, Freezing, Deposition