Summary: Steel Wool is burned in an oxygen rich environment which dramatically increases the rate of reaction.
Oxygen is an oxidizer.
Chemicals and Solutions:
one large cylinder with sand in the bottom
large cover glass
bunsen burner and matches
Fill the cylinder with oxygen and cover it with a large glass square. Holding a piece of steel wool with tongs, ignite the steel wool by placing it in the flame of a bunsen burner. Quickly remove the glass cover and put the glowing steel wool into the oxygen. The steel wool will burn very brightly.
Steel wool (iron) will burn in air quite gently, since air is about 20% (by volume) oxygen. When the steel wool is placed in 100% oxygen the reaction proceeds much faster and vigorously.