Today we are discussing different ways to increase the rate of a chemical reaction. The concept of surface area is often difficult to teach to 8th graders. Whenever I have a difficult concept to teach, I usually resort to lighting something on fire.
Corn starch is a chemically unreactive substance...until it is dispersed into a cloud. Then it can be ignited into a spectacular fireball. Below are two clips of me doing just that at 300 and 600 frames per second.
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