Which element never completes its homework?


How does popcorn pop?

The sound of popcorn popping is almost as much fun as eating it. No wonder it is the most popular snack at movie halls and homes around the world. But what makes it pop in this unique way? Stop wondering and read on.

First, where did popcorn originate?

No one knows exactly where popcorn came from or when it was first popped, but archaeologists have found popcorn in some unusual places. One such place was the tombs on the east coast of Peru where they found grains of popcorn that were a 1,000 years old. These grains were so well preserved that they still popped!

Ears of popcorn were also found in the Bat Cave of West Central New Mexico that were nearly 5,600 years old. One of the oldest finds of popcorn was made in Mexico City where 80,000-year-old fossilized corn pollen was found buried 200 feet below the city! Archaeologists believe that popcorn originated in Mexico, but they know that it was grown in China, Sumatra, and India years before Columbus visited America!

So just how does popcorn pop?

Well, only popcorn kernel (the seed-like corn piece) can pop, and the secret is water. Each kernel contains a small amount of water stored in a circle of soft starch inside the hard outer casing. When heated to around 450 degrees F, the moisture turns to steam, creating pressure within. As the pressure builds, the casing eventually gives way, and the kernel explodes and pops, allowing the water to escape as steam and turning the kernel inside out. If you have ever popped popcorn, you know that it explodes everywhere!

To keep popcorn from exploding everywhere, modern popcorn poppers usually have some way to keep the popcorn contained. Most poppers are covered in some fashion, but the ways of popping popcorn differ greatly. There are air poppers, poppers made for the fireplace, bags designed as poppers for the microwave, foil pans designed for the stove top, and various machines that use heat and oil. Even though our methods of popping popcorn may differ, they really are not that different from long ago.

Archaeologists have found ancient popcorn poppers on the north coast of Peru that date back to the pre-Incan Mohica Culture of about 300 AD. These poppers were usually shallow bowl-like containers with a hole on top and a single handle. They were sometimes decorated with a sculptured or printed motif such as a cat. However, you didn't always even need a popper, as shown by some Native Americans who just spread oil on an ear of popcorn and laid it near a fire. The kernels would pop attached to the ear, and it was even eaten similar to corn-on-the-cob.

So now you know the story of pop corn, go ahead and pop some and have fun!

Tags :     Popcorn     Steam Pressure     Pop    

Save a PDF and you save a tree! Try not to take a print of me!

Like Chemistry? Like us!
Also on: