What is Chemisty?

       Chemistry is concerned with the properties of chemicals and with the changes chemicals can undergo. A chemical is any substance that had a definite composition. Some chemicals such as water and carbon dioxide, exist naturally. Others such as polyethylene, are manufactured.

       Many people think of chemicals in negative terms -- as the caused of pollution, explosions, and cancer. The next time you are getting ready for school take a look at the list of ingredient in your shampoo or toothpaste. You'll see an impressive list of chemicals.

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