I had a look around on Google but still confused. Why can I start a fire with a flint rod and a knife. How are the sparks made and what are they.
In: 10
It doesn’t have to be flint, just any rock harder than 6 on the mohrs scale. Basically, as you strike the stone with the steel, a small piece of metal will be shaved off. If the piece of metal is small enough, it will oxidize (react with oxygen) faster than it can dissipate heat, creating a spark
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