Describes a science activity which allows secondary level students to discover the law of refraction. (SL)

Reviews articles and papers published in 1975 relating to chemistry and presents a number of chemistry experiments, demonstrations,and activities. (SL)

Reports an undergraduate analytical chemistry experiment utilizing the high performance liquid chromatograph. (SL)

Analyzes the physical explanation accounting for tendency of Laboratory spring-mass oscillators to swing sideways. (SL)

Describes an undergraduate experiment which will permit students to analyze the rotational Raman spectra of hydrogen and carbon dioxide and determine the bond distances. (SL)

Describes an experiment for determining the amount of BHA in cooking oil in an undergraduate level chemical technology program. (SL)

Describes demonstrations, some apparently paradoxical, which can be performed with commercially available magnetic stirrers. (SL)

Presents a triple pendulum used to demonstrate normal modes. Also discusses the mathematical similarity of the equations of three coupled quantum mechanical levels. (SL)

Describes an experiment for studying the dynamics of a soft spring. (SL)

Describes an inexpensive photo transistor timing system, apparatus for measuring muzzle velocity, and an apparatus for exposing modes of coupled oscillators. (SL)

Describes a physics experiment for demonstrating magnetic lines of force. (SL)

Experiments by secondary school students which inflict pain and suffering are described. NSTA policy regarding the use of live animals is presented. An argument for the use of animals in research is given along with a recommendation by the author that animal projects should show a reverence for life. (AJ)

Smaller amounts of materials are used in organic chemistry experiments as a means of improving air quality in the laboratory. Presents a preliminary study of the emissions from selected processes and the mixing of these emissions within the laboratory atmosphere. (JN)

To have students develop observational skills and acquire an excitement about chemistry, stereoscopic dissecting microscopes are used to observe the physical characteristics and chemical reactions of various substances. Several of these reactions (including dissolving potassium permanganate in deionized water and reactions between copper metal and…

The International System of Units (SI) or the metric system contains related units which make science simpler for students and teachers. By emphasizing descriptive units, requiring unit use throughout calculations, and using negative exponents, teachers can help students have a better understanding of energy, pressure, and mass concepts. (DH)