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: When [[human]]s [[sweat]] the [[water]] [[evaporation|evaporates]] from the [[skin]] helping them cool down. This works because [[evaporation]] is an [[endothermic]] process so the [[sweat]] takes [[energy]] away from the [[skin]] when it [[evaporation|evaporates]].
==Key Stage 3==
===Meaning===
A '''state change''' is a [[Physical Change|physical change]] in which a [[material]] changes from one [[State of Matter|state of matter]] to another.
===About State Changes===
: '''State changes''' happens when a [[substance]] gains enough [[energy]] to break the [[bond]]s holding [[particle]]s together or loses enough [[energy]] for [[bond]]s to form between [[particle]]s.