September 23, 2009
Fireworks
By Max
I know that gunpowder is one of the four inventions in China, but I never thought of fireworks are made by gunpowder as a material. I know that fireworks are a kind of explosions in the sky, and it is beautiful. But mostly it produces too much smoke after a lot of fireworks. Eventually, fireworks are made of potassium nitrate and a lot of other things, and are made of like gunpowder balls. It shoots out using a cannon and it bursts in the sky. And when the ball is bigger, the explosion is bigger too. So if you see a firework, you know that what it is made!
