Supports the hypothesis that a student must engage a subject in a manner appropriate to his or her present stage of development if he or she is to advance to the next stage of development. Advocates the practice of having introductory physics students observe physical phenomena while they are manipulating equipment in order to foster cognitive…

Suggests the use of a colorimeter in which heat produced is related to the amperage and voltage measured. In relating the quantities, a definition for voltage can be obtained. (CP)

Suggests that the anatomy of a green pea be studied as the culminating laboratory activity of a botany unit in a biology course. (LS)

Provides a solution to the Blackwood pendulum experiment by the use of conservation of linear momentum and conservation of energy of translational motion. (CP)

Describes the operation and numerous educational uses of an electronic music synthesizer. Capabilities (and limitations) of the synthesizer for use as a wave demonstrator are presented. (CP)

Describes the operation and educational benefits of the use of a closed circuit television system in the demonstration of a hologram. (CP)

Describes the science activities at a school camp located in the San Bernadino mountains. Each sixth-grade student in the Long Beach, California school district attends this camp for one week. (MLH)

Presents a simple model which may be used to estimate the seasonal abundance of an insect species, which fluctuates from year to year. (LS)

Looks at fossil collecting from the viewpoint of the amateur and the professional. (CP)

Includes description of a light meter, photometer, fluid flow apparatus, and acoustic grating. (RH)

As part of a meteorology unit, sixth grade science students launched helium balloons with attached return postcards. This article describes Weather Service monitoring of the balloons and postcard return results. (MA)

Presents a detailed discussion of the "Drinking Duck" toy and its use to illustrate scientific and technical issues in thermodynamics. Numerous illustrations and equations are included. (MA)