CK-12 Physical Science - For Middle School

9.1. Properties of Carbon http://www.ck12.org

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FIGURE 9.5

Many common products are made of the plastic known as polyethylene.

KQED: Properties of Plastic

Exploratorium Staff Scientist Julie Yu changes and manipulates the physical and chemical properties of plastic
bottles by exposing them to heat. This is how plastic bags and bottles can be recycled and used over and over again.
For more information on properties of plastic, see http://science.kqed.org/quest/video/quest-lab-properties-of-plas
tic/.

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Forms of Carbon

Pure carbon can exist in different forms, depending on how its atoms are arranged. The forms include diamond,
graphite, and fullerenes. All three forms exist as crystals, but they have different structures. Their different structures,
in turn, give them different properties. You can learn more about them inTable9.1.