Story 15. Popcorn.
Mr. Kelly has been teaching science for nearly twenty-five years.
Every day, he tries to inspire his students.
That's why there is never a boring moment in his science class.
Today, he says, We will make popcorn.
On his desk is a small pot, a small stove, and a bowl of raw popcorn.
He lights the stove and then puts the popcorn in the pot.
The pot gets hot fast.
Soon, everyone can hear the sound of corn popping.
A strong smell of popcorn comes out of the pot!
Five minutes later, everyone is eating popcorn.
Why does it pop? asks Mr. Kelly.
No one knows the answer.
In each little grain of corn, there is a small drop of water.
The heat turns the water to steam.
The steam is powerful.
It breaks the shell and makes the popcorn pop, says Mr. Kelly.
Regular corn will not pop.
Why?
There are no drops of water in the kernels.
So, when the kernels are heated, there is no steam to burst out.
Everyone loves the tasty popcorn.
Now, we all know why popcorn pops.
The mystery is solved!
