B. True or False What to do: Read and understand each statement. Write true if it the statement is correct, write false, if otherwise. 1. Oxidation on metals forms when oxygen reacts with a metal material. 2. The enzymes are substances that speeds up chemical reactions resulting enzyme browning. 3. Chemical changes in materials are reversible. 4. Decomposition is a process when materials break down into simpler forms. 5. Oxidation, enzyme browning decomposition and corrosion are chemical changes that some material undergoes.
When a metal reacts with oxygen, a metal oxide forms. The general equation for this reaction is: metal + oxygen → metal oxide. Rust is a form of iron oxide and it forms slowly when iron is exposed to air.
