Describes the great variety of observations surrounding the auroras (both borealis and australis), and provides photographs from the space shuttle, Discovery. Discusses where and when the auroras can be observed, the process that the Earth's magnetic phenomena fulfill in how and why auroras appear, and the effects of solar wind upon auroras. (JJK)

Describes activities to stimulate school astronomy programs. Topics include: counting stars; the Earth's centripetal force; defining astronomical time; three types of sundials; perceptions of star brightness; sunspots and solar radiation; stellar spectroscopy; number-crunching and the molecular structure of the atmosphere; the Earth-Moon common…

Discusses how computers can help students learn to design experiments, collect data, and quickly analyze that data both mathematically and graphically. Demonstrates some of the capabilities of the spreadsheet for these purposes with examples of data from gas law experiments. (JJK)

Presents an experiment based on the principles of rectilinear motion of light operating in a pinhole camera that projects the image of an illuminated object through a small hole in a sheet to an image screen. (MDH)

Presents two demonstrations to compare the differences between the screen reproductions of a bulb when using a converging lens and a pinhole and how that reproduction image reaches the observer's eye from multiple vantage points. (MDH)

Presents simple experiments to study the basic properties of light utilizing a flashlight, small mirrors, a magnifying lens, a plastic comb, paper and pencil, and a pair of eyeglasses. (JJK)

Provides a basic introduction to fluorescence enabling the amateur scientist to easily, and safely, demonstrate and photograph this phenomenon with the aid of an ultraviolet lamp. Includes a list of necessary equipment and materials, as well as catalog availability from several hardware suppliers. (JJK)

Provides a step-by-step guide for a simple experiment to measure the approximate percentage of oxygen found in the air that we breathe. Includes background theory, working drawings, chemicals needed, list of supplies, experimental procedure, data evaluation method, and suggestions for extended study. (Author/JJK)

Discusses the notion of a musician's workstation and a curriculum for teaching musicians about the use of computers in music. Explains that the curriculum includes elements of physics and psychoacoustics, recording arts and sciences, the philosophy of technology and the musical arts, analog and digital electronic music, ergonomics, and computer…

Various aspects of the solar sail spacecraft such as solar sailing, solar sail design, navigation with solar sails, solar sail mission applications and future prospects for solar sailing are described. Several possible student projects are suggested. (KR)

Examines seventh grade life science students, tenth grade biology students, and college zoology students for understanding of the concept of diffusion. Describes the differences among the grade levels in sound or partial understanding, misconceptions, and no understanding. Discusses the effect of developmental level on understanding. (KR)

Describes a theoretical development to explain the shadow patterns of an object exposed to an extended light source while held at varying distances from a screen. The theoretical model is found to be accurate in comparison with experimental results. (MDH)

Describes a study which analyzed think-aloud protocols of four expert and four novice instructional designers working on a design problem in physics instruction. Differences between novices and experts in problem interpretation, problem analysis, problem representation, solution generation, the solution, internal resources, external resources, and…

A mechanical analogy between the microscopic motion of a charged carrier in an ordinary resistor and the macroscopic motion of a ball falling along a slanted board covered with a lattice of nails is introduced. The Drude model is also introduced to include the case of inelastic collisions. Computer simulation of the motion is described. (KR)

Described is how an iconic model building software can be used to help students gain a deeper qualitative conceptual understanding of physics concepts. The program, STELLA, links research about misconceptions and new teaching strategies with the use of modern information technology tools. (31 references) (KR)