Describes procedures that can help students to make model geodes from eggshells, copper sulfate, and other crystalforming substances. (HM)

Describes a college geology course that incorporates a coastal segment. Field studies are done on Plum Island and include examining beaches, dune fields, and an adjacent marsh and spit. Topics include sedimentation, coastal geomorphology, botanical effects, and coastal studies methodology. (MA)

Describes an exercise developed by the author to help college students to become familiar with the technique of photoelectric photometry of variable stars and permits each student to work with data he or she has personally obtained. (HM)

Details undergraduate physiology laboratory experiments that demonstrate mechanical properties of cardiac muscle, using strips from the ventricle of a rat heart. Includes procedures for obtaining length-tension curves, demonstrating the role of calcium in excitation-contraction coupling, and showing effects of several cardiovascular drugs…

Provides background relating cardiorespiratory disease to physical activity. Three laboratory activities are described: pulse response to posture change and quiet activity, pulse response to exercise (mild increasing to strenuous), and ability to extract oxygen. The last includes information on construction of an ergometer. (CS)

Describes a game that illustrates the principles of population genetics and helps explain the occurrence of evolution through changes in gene frequencies. Demonstrates the importance of genetic variability in evolution: winning is achieved by a player's species becoming "completely heterozygous" for six characteristics. Players move directed by…

Provides instructions for constructing an Ames window tunnel, a device that illustrates illusion and perception. (CS)

Reports findings on research in Red-winged Blackbird territoriality and describes the educational potential of use of similar studies in the classroom. Territorial mapping and observational techniques are explained. (CS)

Describes an experiment using live plants and cigarette smoke to demonstrate the effects of air pollution on a living organism. Procedures include growth of the test plants in glass bottles, and construction and operation of smoking machine. (CS)

Describes a method that uses energy from the sun, absorbed by aluminum discs, to melt ice, and allows the determination of the solar constant. The take-home equipment includes Styrofoam cups, a plastic syringe, and aluminum discs. (MLH)

Describes methods and materials for an innovative laboratory exercise that centers on the concept of mimicry and illustrates the importance of adaptation, natural selection and coevolution. Students are used as predators and raisins as prey. Included are directions for preparation of unpalatable raisins using alum dissolved in reconstituted lemon…

Describes a card game that demonstrates that most metric units used in beginning physics are composed of six fundamental units. (MLH)

Describes an experiment in which nitric acid is synthesized from ammonia on a small scale to illustrate a major industrial process. (MLH)

Presents eight chemistry activities that are interesting and involve simple, easily available materials. Topics include mystery writing, valentine hearts, flame tests, evaporation race, buoyancy versus mass, determination of relative masses of gases, mole sample container, and cold and hot packs. (DDR)

Recommends an approach to the treatment of acid-base equilibria that involves treating each reaction as either going to completion or not occurring at all. Compares the method with the traditional approach step by step. (DDR)