Presents equations and techniques for calculating and interpreting many of the spectroscopically important parameters associated with the ground and second excited states of the iodine molecule. (Author/CS)

Presents background information and a problem on "escape velocity," which applies the gas laws to atmospheric and meteorological phenomena. Also, a problem is presented which requires an understanding of the principles of operation of pressure gauges. (CS)

Describes an experiment that emphasizes the discrete nature of the different oxidation states of vanadium by the separation of ammonium metavanadate into all four species by ion exchange chromatography. (CS)

Outlined are simple activities for studying soil, which can be conducted in the schoolyard. Concepts include soil profiles, topsoil, soil sizes, making soil, erosion, slope, and water absorption. (SJL)

The sport of orienteering is described briefly and ideas are presented that may be useful to the earth science teacher. (SA)

The classroom care and maintenance of terrestrial isopods is described. Includes illustrations of isopod external anatomy, a potato trap for collecting isopods, and a constructed habitat for raising isopods. (MA)

A discussion of Edwin Land's experiments with color images from black-and-white photographs. Information is presented for duplication of these experiments by the amateur photographer. (BB)

Presents a science activity to help students to explore the concept of primary productivity by growing lawn grass in the classroom. (HM)

Presents a cylindrical cardboard model that helps students at the graduate or undergraduate level to visualize the nature of simultaneity and the propagation of light in a rotating coordinate system. (HM)

A participatory science workshop--open house was designed for parents and preschool children to explore together. Organizing and setting up are detailed. (HS)

Describes process-based practical work used in Scottish high school examinations and evaluates this work against a standard of course objectives for practical work in general. (MLH)

Diagrams and explains the construction of a model for the heart and its valves and function of the atria and ventricles, using the contraction of a student's hand to simulate heart contraction. Approximate cost $125. (CS)

Describes classroom science demonstrations and experiments that simulate the process of fossil formation. Lists materials, procedures and suggestions for successful activities. Includes ten student activities (coral fossils, leaf fossils, leaf scars, carbonization, etc.). Describes a fossil game in which students work in pairs. (CS)

Lists materials and procedures for constructing a model that demonstrates certain aspects of the Coriolis effect. Materials include an electric drill motor, voltage control, toy dart gun and darts, wood blocks of varying dimensions. Includes description of an experiment illustrating relationship between speed of rotation and amount of apparent…

Describes an exercise ideal for use in an introductory biology or microbiology course. Requires no special equipment, little expertise in microbiology, and provides a colorful demonstration of microbial interaction. (DDR)