Rusting is an oxidation process where iron reacts with water and oxygen over time, forming rust.
This is a chemical reaction where a substance loses electrons. In the case of rusting, iron is oxidized to form rust.
Corrosion: This is the general term for the wear and tear of materials (like metals) due to chemical reactions - rusting is a type of corrosion!
Hydroxide Ion: This ion (OH-) plays a key role in the formation of rust when water reacts with iron.