Popcorn

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.

爆米花 凯利教授科学已经将近25年了。每一天，他都试图激励他的学生。这就是为什么他的科学课从不无聊的原因。今天，他说，“我们要做爆米花。在他的桌子上有一个小锅，一个小火炉和一碗生爆米花。他点燃炉子，然后把爆米花放进锅里。 锅很快就热了。很快，每个人都能听到玉米爆裂的声音。 一股强烈的爆米花味从锅里冒出来了!五分钟后，每个人都在吃爆米花。

“ 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 corn 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 pop-corn. Now we all know why popcorn pops. The mystery issolved!

“为什么它会爆炸?”凯利先生问。没有人知道答案。“每一粒玉米里都有一滴水。热使水变成蒸汽。蒸汽的力量很大。凯利说，它会打破玉米的外壳，让玉米爆开。“普通的玉米不会爆。为什么?玉米粒里没有一滴水。所以当玉米粒被加热时，就不会冒出蒸汽。”每个人都喜欢可口的爆米花。现在我们都知道为什么会有爆米花了。谜底揭开了!