Yes. A popcorn kernel contains moisture enclosed by a tough outer hull. Heating it builds pressure until the hull breaks, allowing the starch inside to expand.
The USDA describes this pressure-driven expansion. A study published in the Journal of the Royal Society Interface found that popcorn popping near 180°C fits a pressure-vessel model.
Trapped moisture and a hull that holds pressure are both essential to the process. The fluffy popcorn is expanded starch.
Heat builds pressure from moisture inside the kernel until its hull breaks and the starch expands.
Emmanuel Virot and Alexandre Ponomarenko
The researchers found that the approximately 180°C popping threshold is consistent with a pressure-vessel model.
Based on: Journal of the Royal Society Interface
USDA National Agricultural Library
The USDA describes moisture inside the kernel, pressure building during heating, hull rupture and starch expansion.
Based on: USDA National Agricultural Library
Was this check helpful?
Sign in required
Sign in required
No. Peanuts are legumes, like peas and beans. Their familiar name and nutritional similarities to tree nuts do not determine their botanical classification.
No. Camel humps store fat that provides energy when food is scarce. They are not reservoirs of drinking water.
Yes. Venus rotates once in about 243 Earth days and orbits the Sun in about 225. However, its noon-to-noon solar day lasts about 117 Earth days.