everta) that expands from the kernel and puffs up when heated.
Popcorn is able to pop because its kernels have a hard moisture-sealed hull and a dense starchy interior.
Pressure builds inside the kernel, and a small explosion (or "pop") is the end result.
Microwave popcorn is unpopped popcorn in an enhanced, sealed paper bag intended to be heated in a microwave oven.
In addition to the dried corn the bags typically contain solidified cooking oil, one or more seasonings (often salt), and natural or artificial flavorings, or both.