Describes an experiment in which a tumbler is used to simulate the changes that pebbles undergo during stream transport. Provides information on a discussion of results, equipment needed, an additional assignment, and a list of references. (RT)

Describes an experiment in which a simple laser-based apparatus is used for measuring the change in refractive index during the acid-catalyzed hydrolysis of glycidol into glycerine. Gives a schematic of the experimental setup and discusses the kinetic analysis. (MVL)

Discusses an enzyme kinetics laboratory experiment involving a two substrate system for undergraduate biochemistry. Uses the enzyme gamma-glutamyl transpeptidase as this enzyme in blood serum is of clinical significance. Notes elevated levels are seen in liver disease, alcoholism, and epilepsy. Uses a spectrophotometer for the analysis. (MVL)

Describes a lab investigation designed to introduce students to soil compaction and help them to learn to design and adapt procedures that scientists use when they plan and conduct controlled investigations. Provided are objectives, a list of materials, procedures, and a sample student handout. (CW)

Introduces a low-cost protein-testing technique using gel electrophoresis. Describes materials, manufacturing method, and experimental method. (YP)

Shares some of the laboratory activities and demonstrations developed in a physics classroom with the use of a video camera. (ZWH)

Features the concepts of optics and geometry of eclipses. Presents the "eclipse rule," suggesting classroom activities in which students derive this rule. Includes some triangles activities for outdoors that illustrate eclipsing and sighting phenomena. (ET)

Describes activities with organisms from freshwater ponds and ditches. Several experiments involve predation, some involve habitat choices, and one addressees the role of sunlight in supporting plant-eating animals. (PR)

Describes the use of the black-box technique to explore electrical circuit design and circuit elements. (JRH)

Describes a computer-based prelaboratory lecture to replace traditional lecture. Discusses how the CUPLE method was developed, the course structure, and a typical course day. (MVL)

Presents an experiment that makes manifest the energy lost to friction of an iron ball moving along an inclined iron rail, which allows students to compute the rolling friction coefficient. Uses a method based on measurement of deformation produced in a piece of Plasticine by an inelastic collision with the ball and combines mechanical concepts…

Describes experiments to culture cells in a laboratory that provide students with hands-on experience in manipulating cells and a chance to observe cell growth characteristics first hand. Exposes students to sterile technique, cell culture, cell growth concepts, and eukaryotic cell structure. (JRH)

Describes a method to create holograms for use in different interferometry techniques. Students utilize these techniques in experiments to study the structural integrity of a clarinet reed and the effects of temperature on objects. (MDH)

Describes a photogate electronic flash trigger that synchronizes flash discharge with high-speed events. Presents a photographic study of a high-speed collision demonstrating the passage of a BB through an elastic strip. Provides the schematic of the delay circuit utilized in the trigger. (MDH)

Discusses the use of computers in physics education as a tool in individual student research projects for simulating both simple and more complicated phenomena. Reviews IBM compatible software associated with computer-assisted instruction in physics education. (PR)