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→About States of Matter
: [[Material|Materials]] can be [[solid]], [[liquid]] or [[gas]].
: The '''state of matter''' can be changed by heating or cooling the material.
: Heating can turn a [[solid]] into a [[liquid]] and . This is called [[melting]].: Heating can turn a [[liquid]] to a [[gas]]. This is called [[evaporating]].: Cooling can turn a [[gas]] into a [[liquid]] and . This is called [[condensing]].: Cooling can turn a [[liquid]] into [[solid]]. This is called [[freezing]].
====Solid====