What happens to the water inside the kernel when it is heated?
When you heat the corn kernel, it heats the water inside the corn kernel. Water turns to steam and expands when it is heated. This expansion of steam creates pressure inside the corn kernel which pops the corn kernel.
What happens to corn when heated?
When the corn kernel is heated the small droplet of water which is enclosed by a hard shell called hull inside the popcorn kernel turns into steam and develops pressure inside the kernel. When the pressure inside the hull becomes uncontrollable the kernel burst out and fluffy popcorn is formed.
Where is the water in a popcorn kernel?
A kernel of corn has a strong outer coating called the “pericarp”. Inside that is starch, which can turn into soft fluffy popcorn. Most of the moisture is in the starch. The corn is dried on the cob out in the field, until the water concentration inside the kernel drops down to about 16%.
What happens inside a popcorn kernel when it gets hot?
As the kernel heats up, the water expands, building pressure against the hard starch surface. … As it explodes, the soft starch inside the popcorn becomes inflated and bursts, turning the kernel inside out. The steam inside the kernel is released, and the popcorn is popped, hot and ready to eat.
What accounts for the loss of mass after popping?
Popcorn kernels contain a small amount of water that turns into hot steam when the kernels pop. The more of this steam that escapes, the more the mass of the bag decreases. This is why the mass decreased even more when we opened the bag!
Why do corn bags not pop?
Feed corn is naturally cracked open at the bottom where it comes loose from the cob, and will not pop open when heated. For the corn bags, you should use whole corn, not cracked corn, as the cracked corn will dry out too quickly.
How can a corn kernel go from a hard seed to fluffy popcorn we eat?
When a kernel pops, this plant food known as starch, becomes the fluffy and tasty part we recognize as popcorn. Bring the Heat! When a popcorn kernel gets hot enough, the starch inside the seed melts. The water molecules in the starch move faster and faster, changing from liquid water to water vapor.
How much does 1 popcorn kernel weigh?
According to my scale, kernel . 137 grams. Popped kernel . 122 grams.