Presents an experiment that makes manifest the energy lost to friction of an iron ball moving along an inclined iron rail, which allows students to compute the rolling friction coefficient. Uses a method based on measurement of deformation produced in a piece of Plasticine by an inelastic collision with the ball and combines mechanical concepts…

Describes experiments to culture cells in a laboratory that provide students with hands-on experience in manipulating cells and a chance to observe cell growth characteristics first hand. Exposes students to sterile technique, cell culture, cell growth concepts, and eukaryotic cell structure. (JRH)

Describes an excursion that effectively helps students visualize the earth's immense size and numerous structures without the usual scale and ratio distortions found in most textbooks and allows students to compare their body's height to a scaled-down earth. (JRH)

Discusses important tenets of the Scope Sequence and Coordination (SS&C) project and presents the SS&C high school project designed specifically to achieve the National Science Education Standards. Specifies the scope, sequence, and coordination of the natural sciences in grades 9 through 12 in support of general goals taken from the…

Describes a method to create holograms for use in different interferometry techniques. Students utilize these techniques in experiments to study the structural integrity of a clarinet reed and the effects of temperature on objects. (MDH)

Presents a concept-map scheme that provides a consistent syntax and grading system for using concept maps as assessment tools. The grading scheme awards points for demonstrating hierarchies, relationships, branching, and cross links. Examples showing the use of the key are presented. (PR)

Presents a classroom activity wherein students use dilution techniques to gain an understanding of small measurements such as parts per million, billion, or trillion. Includes activity extensions, two lists of analogies for thinking about the size of small quantities, and questions leading to further investigations. (six references) (MCO)

Presents a simple, graphical method for tracking the apparent motion of the Moon through a seven-day phase. Describes the necessary equipment, and the daily procedure for making observations. Includes suggested open-ended questions along with an appropriate reference. (JJK)

Describes a photogate electronic flash trigger that synchronizes flash discharge with high-speed events. Presents a photographic study of a high-speed collision demonstrating the passage of a BB through an elastic strip. Provides the schematic of the delay circuit utilized in the trigger. (MDH)

Describes a homemade experimental chamber constructed to accurately measure the refractive index of a transparent liquid. (MDH)

Discusses the use of computers in physics education as a tool in individual student research projects for simulating both simple and more complicated phenomena. Reviews IBM compatible software associated with computer-assisted instruction in physics education. (PR)

Describes an educational game called "Population Blocks" that is designed to illustrate the concept of exponential growth of the human population and some potential effects of overpopulation. The game material consists of wooden blocks; 18 blocks are painted green (representing land), 7 are painted blue (representing water); and the remaining…

An extensive observational project of the movement of the moon is described. Directions for building a cross-staff used to measure the angle between specific stars and the moon and a copy of a stereographic projection of the celestial sphere used in data reduction are provided. (KR)

An activity in which students design and build an apparatus that can be used to rapidly determine the specific gravities of small substances is described. Calculations needed to determine the density of substances when using the Jolly balance are included. (KR)

The development of aids for teaching a general physics course to blind students is discussed. Described are how the materials should be used considering the topic of equilibrium of a rigid body. Results and improvements obtained with this method of teaching are briefly discussed. (KR)