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==Key Stage 3==
===Meaning===
A '''chemical change''' is a change that results in new [[Chemical|chemicalschemical]] s being formed.
===About Chemical Changes===
: '''Chemical changes''' are usually [[irreversible]]. However, some can be [[reversible|reversed]].
:'''Chemical changes''' [[product|produce]] new [[chemical]]s which have different [[Physical Property|physical]] and [[Chemical Property|chemical properties]] from the [[reactant]]s. ===Examples===: Cooking food involves several '''chemical changes'''. Baking a cake and toasting bread causes [[Chemical Reaction|chemical reaction]]s that are used to change the texture and flavour of the food.