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Direct linkHumphrey, 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)
Download full textSu, Jun-Ming; Lin, Huan-Yu; Tseng, Shian-Shyong; Lu, Chia-Jung – Turkish Online Journal of Educational Technology - TOJET, 2011
Promoting the development of students' scientific inquiry capabilities is a major learning objective in science education. As a result, teachers require effective assessment approaches to evaluate students' scientific inquiry-related performance. Teachers must also be able to offer appropriate supplementary instructions, as needed, to students.…
Descriptors: Foreign Countries, Web Based Instruction, Portfolios (Background Materials), Learning Problems
