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I'm doing a science fair on popcorn and I would like to know why is it that a kernel of popcorn pops when heated in the microwave.
Answer 1:

Popcorn pops because the water in it is heated by the microwave and turns to steam, which takes up more volume than water, and thus forces out the kernel. The less water there is, the quicker the microwave will heat it up, but the less violently it will pop when it does because there will be less steam. I have no idea which brands have different kinds of corn, though.



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