Discusses the building of a scientific theory on the basis of its characteristics including inflexible and comprehensive nature and related degree of trueness.'' Indicates that detailed phenomenon explanation, clarification of the theory scope, and presentation of competing theories are worthy objectives to pursue in teaching science to…

An attempt to stimulate interest in solar study is made by discussing how it could fit into a physics curriculum and by describing an effective installation already in use. (DF)

Describes computer assisted simulation model for studying problems of an ecosystem. Example used is algae-Daphnia-predator system. Problems for students to solve in this ecosystem are described. (PS)

Discusses use of two EAI semi-expanded TR-20 units to display solutions to differential equations for harmonic oscillators, quantum-mechanical particles, trajectories, radioactive decay series, and hysteresis curves. Suggests practical applications for both undergraduate physics laboratories and classroom demonstrations. (CC)

Discusses the fundamentals of two personnel dosimeters: the lithium fluoride thermoluminescent dosimeter and the silver-activated phosphate glass radiophotoluminescent dosimeter, and indicates the usefulness of this presentation for both teachers and students. (CC)

Outlines experiments in which a density gradient might be used to advantage. A density gradient consists of a column of liquid, the composition and density of which varies along its length. The procedure can be used in analysis of solutions and mixtures and in density measures of solids. (Author/TS)

Reviews the general structure of the educational system in Ghana, insufficient numbers of trained teachers, the movement to renovate the 0 level physics syllabus, advanced level physics and the selection of students, and the lack of opportunities for physics graduates. (PR)

Describes a course for non-engineering students at Lafayette College which includes the design process in a project. Also included are the study of modeling, optimization, simulation, computer application, and simple feedback controls. (Author/TS)

Presents summary of AAAS Commission on Science Education, Teacher Education Committee report, Preservice Science Education of Elementary School Teachers." Recommendations for preservice science course objectives, content and facilities are based on deliberation at seven national conferences. Emphasis is placed on trends in elementary school…

One application of modeling is studying the ways in which molecules fit together to form chemical compounds. Describes the forces acting between molecules and how three-dimensional graphical modeling is employed in developing rational principles for drug design. (JN)