The Glossary of Frequently Misused or Misunderstood Physics Terms and Concepts is provided by Donald E. Simanek of Lock Haven University. The glossary is said to focus on those terms which give students particular difficulties in physics such as Avogadro’s constant, centrifugal force, closed system, electricity, experimental error, kinetic energy, and many more. This simple site contains no graphics, but does do a good job of explaining these sometimes confusing terms with easily understandable text. Links to other terms are provided throughout as well as helpful “”misuse alerts”” that detail common student comprehension mistakes.