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The Science of Fire: Exploring Steel Wool's Spectacular Burn . Steel Wool Pyrotechnics: A Fiery Science Experiment!

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Steel wool is made of very thin iron filaments. When it is ignited, the iron reacts with oxygen in the air to form iron oxide. Because steel wool has a very large surface area, the reaction happens very quickly. Spinning the steel wool increases the supply of fresh oxygen, making the reaction brighter and more intense. The flying sparks are tiny molten droplets of iron that glow as they oxidize in the air.

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