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state (states of matter)

the three forms (solid, liquid, gas) in which most matter on Earth exists

change of state

the physical change of matter from one state to another

melting

The change in state from a solid to a liquid

freezing

the change of state from a liquid to a solid

evaporation

vaporization that takes place at the surface of a liquid

boiling

vaporization that occurs on and below the surface of a liquid

condensation

the process of changing from the gaseous to the liquid state of matter

thermal expansion

the expansion of matter when it is heated

Gaseous state

The most disorganized state of matter. It expands to fill all the space available.

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