rust
Magnesium oxide. It's produced by magnesium reacting with oxygen.
An oxide I reckon.ExamplesAluminum oxideFerric oxide (aka rust)
Water
oxygen. the definition of combustion is: a substance reacting with oxygen to create heat and light.
Trees leaves
CO2 and water is needed. Oxygen and glucose are produced
Oxygen
About 60% of our oxygen is produced by phytoplakton.
When a metal corrodes, it reacts with a chemical in the environment to produce a new substance. Often the metal reacts with oxygen to form a metal oxide. A well-known example is iron reacting with oxygen to form iron oxide, known as rust.
water
respiration
Respiration