Scenario: Ms. Coburn was biking down a country road when she lost control of the bike and crashed into the woods. When they rushed her to the hospital, the bike was left behind in the woods. When Mrs. Haddock finally retrieved the bike three months later, the bike was not as shiny as she remembered. Exposed to the elements the bike had rusted.

Task: Develop a model that will explain how the iron of the bike has changed into rust. The Chemical formula Fe₂O₃

Planning: Type some ideas for your model here.