Popcorn is a beloved snack worldwide, but have you ever wondered why it pops? The secret lies in the unique structure of popcorn kernels. Each kernel contains a small amount of water trapped inside a hard, starchy shell. When heated, the water turns into steam, building up pressure inside the kernel. Once the temperature reaches around 180°C (356°F), the pressure becomes too great, and the kernel bursts open, turning inside out and forming the fluffy snack we love.
Unlike other types of corn, only popcorn kernels have the perfect combination of water content and a strong shell that can withstand the build-up of steam. If the shell has even the tiniest crack, the steam escapes, preventing the kernel from popping.
The fascinating physics of popcorn has even been studied by scientists who analyze the speed and force of popping kernels. Some studies suggest that a popping kernel can launch itself as high as 15 inches in the air! Next time you enjoy a bowl of popcorn, you can impress your friends with the science behind this delicious, explosive snack.