Chemistry and History
Storyboard Text
- Hello! Today I am going to tell you about chemistry and history.
- Fireworks were invented in 800 AD. In China an alchemist mixed sulfur, charcoal, and potassium nitrate to try to find the secret of eternal life. Doing this he made gun powder. They would put the gun powder in bamboo or paper tubes. They would light it on fire and fireworks were born.
- The internal combustion engine was created in 1860 by Etieneen Lenoir in Paris. It ran from a mixture of coal gas and air.
- Polyethylene was created in 1933. It was created in England by two scientists. They were trying to react ethylene and benzaldehyde but accidentally created polymer. It is now a very popular plastic.
- In 1965 Stephanie Kwolek created a material called Kevlar. She made this in Wilmington Delaware. This material is made of synthetic fibers and are used in making protective vests, boats, planes, ropes, cables, and more.
- In 1970, George Gray at the University of Hull, made LCD's function at more pleasant temperatures. He made a molecule known as 5CB. 90% of the LCD devices in the world contain 5CB.
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