![]() There is more oxygen available in a given area for it to react with, and there can be more of a heat build up in a smaller area. Use your 5 volt arduino and have fun with them instead raid your electronics junk box to build the cestino (arduino compatible) board and nine other. The hotter the steel wool gets, the more likely the oxidation reaction will happen. It can burn, unlike a nail, screw, knife, or forks because of the increased surface area ratio. The release of heat from the spark causes a new piece of iron to heat up, react, spark, release of heat… and creates a chain reaction that can continue even when you remove the battery from the steel wool. It heats up so much, that it creates a spark. The hotter something gets, the more electrical resistance it will have. The slowing down of the charged particles is also known as electrical resistance. Electrical current is the flow of charged particles that collide with the iron atoms, slowing them down. The surge of electrical current from the battery heats up the iron which causes it to react with the oxygen in the air surrounding it. Steel wool is made mostly of iron which is extremely conductive. It’s that simple! But what’s really happening? When you touch the 9 volt battery to it, the steel wool makes a completes the circuit of the battery. ![]() 9 Volt battery, steel wool, non-flammable surface, and some adult supervision.Īfter fluffing up the steel wool a bit place it on your non-flammable surface, then simply touch the 9 volt battery to it. You can do this experiment at home with just a few things. ![]()
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