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Direct linkChaytor, Jennifer L.; Al Mughalaq, Mohammad; Butler, Hailee – Journal of Chemical Education, 2017
Online prelaboratory videos and quizzes were prepared for all experiments in CHEM 231, Organic Chemistry I Laboratory. It was anticipated that watching the videos would help students be better prepared for the laboratory, decrease their anxiety surrounding the laboratory, and increase their understanding of the theories and concepts presented.…
Descriptors: Undergraduate Students, Organic Chemistry, Science Laboratories, Web Based Instruction
Humphrey, T. E.; Calisa, Vaishnavi – Physics Teacher, 2014
In 1879, in the midst of the debate between English and continental scientists about the nature of cathode rays, William Crookes conducted an experiment in which a small mill or "paddle wheel" was pushed along tracks inside a cathode ray tube (CRT) (similar to that shown in Fig. 1) when connected to a high-voltage induction coil. Crookes…
Descriptors: Demonstrations (Educational), Motion, Scientific Concepts, Mechanics (Physics)
