Describes examples of force in daily living. Discusses some examples of gravitational, internal, external, and centrifugal forces in various situations by using force vectors with diagrams. (YP)

Discusses the presentations of chemical demonstrations, hands-on experiments, and magic shows. Presents 12 guidelines to follow when presenting chemical demonstrations. Points out the obligations of the presenters for the safety concerns of the general public. Notes information available from the American Chemical Society. (MVL)

Discusses a new method for determining the eigenvalues of the Schroedinger equation when the potential energy function does not have a simple form. Describes the mathematical methods and provides an application. Lists limitations to the method. (MVL)

Describes a method for making a simple, inexpensive apparatus which can be used to determine Planck's constant. Provides illustrations of a circuit diagram using one or more light-emitting diodes and a BASIC computer program for simplifying calculations. (RT)

Discusses a course at the University of Wisconsin-Eau Claire which improved instruction in physical hydrogeology, chemical hydrogeology, and water resources. Describes 14 laboratory activities including objectives, methods, and a list of equipment needed. (Author/MVL)

Discusses books and materials published by creationist organizations to promote creation-science interpretations on the demise of the dinosaur. Compares many creationist theories with current evolution theories and geological records. (MVL)

Discusses using the geologic history of the Paleozoic era for presentations. Describes methodology involved including data collection, summarizing and presentations. Notes the approach has received an enthusiastic response from students and is a rewarding change from the traditional lecture format. (Author/MVL)

Investigates Japanese efforts to enter a new phase of its postwar technological period with a focus on internationalization of its economy and industry. Analyzes which technologies will dominate the early 21st century and their relationships to each other. (MVL)

Presented are two chemistry demonstrations: (1) an alternative method for the demonstration of the properties of alkali metals, water is added to small amounts of metal; (2) an exploration of the properties of hydrogen, helium, propane, and carbon dioxide using an open trough and candle. (MVL)

Discusses benefits, costs, locales, class recruitment, field supplies, timing, and testing methods. Provides a listing of Caribbean marine field stations routinely available to college classes. (MVL)

Discusses a questionnaire sent to 763 Society for College Science Teaching members to identify problems of teaching nonmajors. Notes the questionnaire had a high return rate. Lists the eight major problems: post negative experiences; motivation; what to teach; abstractions; how to introduce relevance; staying power; inquiry material; and…

The development of a framework for analyzing pupil talk is described and the reliability of scoring transcribed conversions using the framework discussed. Definitions and examples of the terms used in the framework are appended. (Author/YP)

Findings are reported from a study which compared the effectiveness of specialized and general fifth-grade science teachers (N=86). A causal model, derived from path analysis, was constructed to explain the apparent lack of effect on student achievement of the superior preparation and instruction of specialized teachers.(IAH)

Notes that criticism of the training offered by universities to future chemists is well documented. Suggests a 17-step model for the planning of a chemistry course that utilizes a competency-based training program. Explains each step and lists sample objectives. (MVL)

Reviews some important properties of the bimolecular reaction between the hydroxyl radical and carbon monoxide. Investigates the kinetics of the reaction, the temperature and pressure dependence of the rate constant, the state-to-state dynamics of the reaction, and the reverse reaction. (MVL)