Describes two experiments for a sophomore level organic chemistry utilizing commercially available borane-methyl sulfide (BMS). (SL)

Presents basic theory of silicon solar cells and discusses their use in experiments in undergraduate teaching laboratories. (SL)

Describes experiments in the measurement of resonances in a nuclear reaction and the measurement of elastic scattering cross section. (SL)

Reviews classroom teaching ideas including burning sugar cube experiments, science library reference materials, and growing salt crystals. (SL)

Reviews the SDS-polyacrylamide gel electrophoresis technique for the separation of proteins and determination of their molecular weights. (SL)

Presents a laboratory project in which students analyze quantitatively organic and inorganic industrial waste. (SL)

Presents a biochemistry laboratory experiment in enzymology using polyphenoloxidase or tyrosinase. (SL)

Using winter snow, kindergarten students can explore the properties of water. Students demonstrate melting, freezing, expansion, and evaporation through a number of activities involving a paper cup and a scoop of snow. Procedures and student reactions are described in detail by the teacher-author. (MA)

Presents an experimental method for introducing special relativity which utilizes the distinction between Doppler effects for sound and for light. (SL)

Describes apparatus for demonstrating magnetic lines of force, plastic discharge tubes, minimum angle of deviation of light passing through a prism, light scattering, and measuring high voltage. (SL)

Describes a method of recording galvanometer deflections when using a d'Arsonval galvanometer to demonstrate forced, damped simple harmonic motion. (SL)

A high school class, housed in a temporary prefabricated structure, designed and built a solar energy element to heat the building. (JD)

Smaller amounts of materials are used in organic chemistry experiments as a means of improving air quality in the laboratory. Outlines benefits from this approach and describes two representative experiments in detail. These experiments are the Cannizzaro reaction and preparation of an aromatic nitrile. (JN)

Two demonstrations are described. The first (useful as an introduction to kinetics) shows how the rate of a reaction is fast at first and then gradually decreases to zero when one reactant has been used up. The second is a gas density demonstration using 1,1,2-trichloro-1,2,2-trifluoro ethane. (JN)

Shows how a standard slide projector can be adapted for use as an effective spectroscope. Also describes three experiments using the modified slide projector. (JN)