Covalent Bond Energy

Eating, putting gas in a car and throwing a log on a campfire all involve adding energy to a system. In each case, the energy is added in the form of covalent bonds that hold atoms together in molecules.

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Metric System Unit Prefixes

Similar to scientific notation, unit prefixes make very large and very small number easier to manipulate and to understand.

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Scientific Notation

Some people have a strong resistance to using scientific notation. Almost every time I teach an introductory science class, I have one or two students with good math skills who insist on doing all of their calculations in standard notation. Doing this invariably results in mistakes that lead to lost points on exams and homework.

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