Points out that the most basic of creationist attacks of geology, their claim that uniformitarianism is an unreliable basis for interpreting the past, fail because the uniformitarianism they describe is no longer a part of geology. Indicates that modern uniformitarianism is merely the philosophical principle of simplicity. (Author/JN)

Thomas G. Barnes, geologist/creationist, argues that the geomagnetic field was created by unknown processes when earth was created and has been decaying (irreversibly/exponentially) with a half-life of about 1,400 years since then. Shows that Barnes' proposition is wrong and explains why the earth's age cannot be determined from magnetic-field…

Discusses four problems facing gifted students in elementary science classrooms. Suggests development of teacher-made science packets to resolve these and other problems. A sample lesson on animal classification for grade three is provided. (JN)

Compared effectiveness of discovery and expository instructional strategies on science knowledge and attitudes of fifth-grade Egyptian students (N=276). Although there were no sex differences, students taught by discovery scored higher in achievement (recall and application) and attitudes than those taught by the expository method. (JN)

A two-part unit for second-grade students was developed to make children aware of the kinds of energy, problems connected with each energy type, and to introduce the decision-making process. Rationale for the unit and individual unit lessons and activities are discussed. (Author/JN)

Discusses determination of elliptical path of a satellite caught into orbit by the sun or earth; using microcomputer as signal generator (includes program listing); collision process; simple hysteresis loop using double beam CRO; method of demonstrating parallelogram of forces; measuring radius of electron beam curvature; and half-life of thorium…

This paper discusses George Kelly's theories concerning ways that individuals build personal constructs of reality to interpret their experiences and illustrates how these theories could apply to science education. Teachers should encourage students to express their personal constructs; views of students and teachers should be respected. (PP)

Discusses: (1) construction of an integrated spherical reflectometer; (2) limitations of the NOAA Weather Radio Network; and (3) a simple experiment to demonstrate/measure influence of damping force on amplitude resonance. Also discusses whether or not a homemade electrophorus can lose its charge and then recharge itself. (JN)

Lasers are useful for demonstrating ray optics, especially in large classrooms where a well-defined, easily-viewed ray is essential. Described is a simple device that converts any laser to a projection oscilloscope (or laser spirograph). Suggestions for using the device (including demonstrating Lissajous figures and conic sections) are provided.…

Thirteen demonstrations using a capacitor-start induction motor fitted with an aluminum disk are described. Demonstrations illustrate principles from mechanics, fluids (Bernoulli's principle), waves (chladni patterns and doppler effect), magnetism, electricity, and light (mechanical color mixing). In addition, the instrument can measure friction…

Contends that the nature of physics has been misrepresented by blurring or ignoring important distinctions between "errors" and "discrepancies" and that dealing with these and related problems can improve students' enjoyment of labs and understanding of physics. Nature of physics, role of experiments, experimental errors, and error analysis are…

Speculates that physiological changes resulting from repeated, long-term stimulation in human and laboratory animal brains are related to short- and long-term memory processes. Describes a physiological-based model which may explain many current learning theory principles and can serve as a foundation for developing new learning theories based on…

Questionnaires were sent to biology, chemistry, physics, and earth science teachers (N=100) to determine practical problems at the student/teacher/subject matter interface. Responses related to importance of content area for students and difficulty students have in learning the content are discussed. (SK)

Compared performance on Piagetian tasks to determine differences between students (N=52): (1) external subjects having access to manipulatives and those not having access, and between internal subjects having access to manipulatives and those not having access. Indicates access to manipulatives benefits those exhibiting externality with respect to…

Presents the full text of Arkansas Act 590 (1981) requiring balanced treatment of creationism and evolution in public schools of this state. Includes, among others, requirements for balanced treatment, prohibition against religious instruction, requirements for nondiscrimination, definitions of "creation-science" and…