Answer is: chemical decomposition or <span>analysis.
Balanced chemical reactio: CaCO</span>₃(s) → CaO(s) + CO₂(g). CaCO₃ is calcium carbonate. <span>CaO is calcium oxide. CO</span>₂ is carbon (IV) oxide or carbon dioxide. Chemical decomposition is the separation of a single chemical compound (in this example calcium carbonate)<span> into its two or more simpler compounds (in this example calcium oxide and carbon dioxide).</span>