Presents results of analyses of flat and conical depressed target surfaces used in a bouncing ball experiment. (SL)

Describes a chemistry laboratory activity for determining the best procedure for analyzing iodide in seaweed. (SL)

Describes a method of determining the molecular weight of a weak acid. (SL)

Outlines a problem concerning the computation of hydrogen spectral line wavelength in a general physics class which is appropriate for computations on calculators with 8 significant digits of accuracy. (SL)

Describes the construction of paddle boats and inquiries that can be made with the boats. (SL)

Describes an experiment for determining the blackbody radiation constant hc/k, utilize a conventionally built cavity and a single-beam, single-window Perkin-Elmer 12-C model spectrometer. (SL)

Describes a program which can be written to represent stellar motion in the galactic plane. (CP)

Reports on the increased enthusiasm of college students toward physics following the development of student-activated corridor display units. Includes a listing of displays and comments on student reactions. (CP)

This year-long science program involved fifth grade students in the investigation of a meadow pond. Two field trips to collect pond water and organisms were arranged for the beginning and conclusion of the program. Classroom activities were designed to study aquatic organisms, life cycles, populations, and ecosystems. (MA)

Describes activities by which the porosity and permeability of materials with respect to water can be measured. (CP)

This article describes how Robert LeBleu's interest in aquatic life developed and that today he owns a large hydroculture operation supplying research crayfish nationwide. Suggested laboratory experiments with crayfish are described, as well as information on additional studies, equipment needs, and tours of the hatchery. (MA)

Described is a classroom activity for analyzing an inherited human trait, the ability to tast phenylthiocarbamide (PTC). Formulas for analyzing gene frequency are given for classroom and neighborhood samples. Additional tables include statistics on the ability to taste PTC and other easily sampled human traits. (MA)

In this exercise, students examine Aristotle's weight hypothesis by testing variously shaped marble chips. These chips are weighed and dropped down a water tube. Average fall times and weights are recorded and graphed. Students are asked to apply this information to rock and soil deposition by streams. (MA)

Presents a variety of outdoor and classroom activities in which soil is used to teach environmental concepts and to provide students with science process skills practice. Areas considered include: site selection and description; compaction; infiltration rate; temperature; components; water content; and microorganisms. (DH)