Popping Popcorn with Convection Currents

Who knew that a tasty snack such as popcorn could be cooked with a form of heat transfer. Out of the three different types of heat transfer, popcorn cooked in a microwave is using convection currents, or the transfer of heat through a fluid. When the popcorn is placed in the microwave, the heat travels through the air in the form of convection currents. Within each kernel of popcorn is a small drop of water the turns to vapor when the convection currents heat the drop enough. When the pressure inside the kernel is too great, it has to find a way to escape. As it forces its way out of the kernel, the piece of popcorn pops. Through this process of heat transfer, you get to enjoy a tasty snack!