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It is estimated that one in five Americans will develop skin cancer and that 90 percent of those cancers will be the result of exposure to _____.

What is a type of cold light that is blocked by the ozone layer?

What is the study of substances that lack the element carbon, but may contain the element hydrogen?

Mutually soluble liquids that can be mixed together to form clear solutions are _____.

A stable physical mixture of two or more substances in a solvent is a(n) _____.

Currents used in electrical facial and scalp are called _____.

What term refers to substances that speed up chemical reactions?

The path of an electric current from the generating source through the conductors and back to the original source is a(n) _____ electric circuit.

The branch of science that applies to substances that contain carbon is called _____ chemistry.

All haircolor products are organic chemicals, which means they _____.