Автор: Christopher R. Hren

Christopher R. Hren has taught high school chemistry, honors chemistry, and AP Chemistry for more than 15 years. John T. Moore, Ed D, has taught chemistry at Stephen F. Austin State University in Nacogdoches, Texas, for more than 40 years. Peter J. Mikulecky, Ph D, teaches science and math at Fusion Learning Center and Fusion Academy, and is a technical writer.