Popcorn is a delicious snack that is portable and customizable! But, how does popcorn actually pop? It is all because of pressure. Inside of a kernel of popcorn, there is a small amount of water. This is why popcorn needs to maintain a certain level of moisture. As the water in the kernel heats up, it turns into a gas (steam or water vapor) and starts to expand. It pushes up against the starch walls and builds up pressure. Eventually, the kernel cracks open and the inside of the kernel gets flipped to the outside. The inside of the kernel is what we enjoy as a snack! That is how popcorn pops!
