Provides instructions and a list of materials needed to demonstrate: (1) a model of the quantum mechanical atom; (2) principles involved in metal corrosion and in the prevention of this destructive process by electrochemical means; and (3) a Thermit reaction, modified to make it more dramatic and interesting for students. (SK)

Two demonstrations are described: (1) a sunset effect using a gooseneck lamp and 20 sheets of paper and (2) the preparation and determination of structural features of dimethyl sulfoxide (DMSO) by infrared spectroscopy. (SK)

Describes a versatile mount for Slinky wave demonstrator and dynamics experiments using pool balls which have been altered by various means such as hollowing out or filled with lead. Suggests tightening screw holding motor clamp to prevent random speed fluctuations in ripple tanks. (JN)

Describes a method to allow direct observation of a chick embryo development from three days to about 17 days of incubation, by culturing the entire embryo in a petri dish. (DS)

Describes ways platyfish can be utilized in biology activities and experiments. Includes an account of the animals' care, unique anatomical characteristics, reproductive behavior, and genetics. (DS)

Provides examples of several classroom activities utilizing the American horseshoe crab (Limulus Polyphemus), including raising fertilized eggs, fertilizing eggs in vitro, and testing water samples. Includes background information on the natural history, life cycle, and breeding habits of this animal. (DS)

Describes the Space Shuttle Student Involvement Project which attempts to stimulate high school student interest in science and technology by engaging students in a competition to develop experiments suitable for flight aboard the Space Shuttle. Also describes "Getaway Specials" which allow individuals to send up experiments in the…

Four means of altering fat levels in laboratory mice, contrasting invasive injection techniques with non-invasive dietary and behavioral means, are described. Relates these investigations concerning obesity to the practicality of using animal models as an approach in searching for physiological knowledge about human beings. (CS)

Explains that the result of collision experiments with a linear arrangement of several identical elastic balls cannot be predicted solely from the conservation laws and energy and momentum. Indicates that the system of balls must be capable of dispersion-free energy propagation. (Author/JN)

Described is an experiment used in an undergraduate biochemistry laboratory involving inducing rickets in chicks and correlating the disease to a reduction in vitamin D-dependent calcium binding protein. Techniques involved are hormone induction, protein isolation, and radioisotope methodology. (Author/DS)

Discusses simplified experiments in which sinusoidal signals are detected when a laser beam is sent into a photodiode. (HM)

Discusses an addition to an apparatus which allows the effect of temperature on a paramagnetic compound to be measured, therefore demonstrating the Curie-Weiss law. The experiment can be used as a demonstration or student experiment to stimulate discussion of magnetic susceptibility and ligand field trips. (Author/JN)

Presents three different procedures in which reagents are added in a specified order to a large beaker containing an aqueous solution of nickel sulfate. Complex ions of nickel (II) are prepared by using aqueous solutions of ammonia, ethylenediamine, dimethylglyoxime, and cyanide ion. (CS)

Different programs have been developed for the simulation of physics experiments by using TI-57 programmable calculators. Two of these programs, describing the simulation of a successive radioactive decay and the random motion of a gas molecule, are presented. (Author/SK)

Presents an experiment for inorganic, organic, or physical chemistry students utilizing acid-base titrimetry to study the stoichiometric of a solid state reaction. Time involved ranges from one to three, three-hour lab periods. (Author/SA)