Describes an experiment which measures the surface tension of a liquid and illustrates interfacial spreading and the Marangoni effect. (MLH)

Describes an experiment in which the iron content of a commercial vitamin tablet is determined by comparing its visible spectrum to the visible spectrum of a standardized iron solution. (MLH)

Describes demonstrations which can be performed with a synthesizer and oscilloscope combination. (Author/CP)

Advocates allowing students to form groups of three in which they may work together on tests. Discusses reactions of students to the arrangement. (CP)

Describes a technique utilizing analyses of photographs to study planetary motion. (CP)

Outlines some of the topics discussed in the Schools Council's Geology Curriculum Review Group Report which was set up to examine the place of geology in the school curriculum. Presents a graphical model showing the relationship of geology to other physical and social sciences. (CP)

Describes a series of experiments designed to verify the various relationships implicit in the ideal gas equation and shows that the success of the Graham's law effusion experiments can be explained by elementary hydrodynamics. (GS)

Describes the author's experiences in using individualized or small-group, self-contained learning units (kits) to teach science. Problems encountered and procedures used in the development of these kits are included. (PEB)

Gives illustrations for experiences designed to help intermediate (grade 6) children learn to follow directions. Activities, in the form of five stations contained in one classroom, were developed with each activity focused on a different approach to problem solving and observation. (PEB)

Presents a mathematical demonstration that the least action principle enables both the trajectories and the conservation laws (of energy, momentum, and angular momentum) to be obtained without using Lagrange's equations. Discusses an experimental procedure which utilizes air tables to demonstrate the conservation laws and interactions at a…

Questions present methods of science instruction in secondary schools. Offers suggestions to increase learning efficiency by substitution of alternate instructional procedures. The Exploratorium in San Francisco is identified as one alternative. (CP)

Outlines the ecology of Lasius flavus ant hill, describes sampling techniques for the determination of the species composition of the surrounding vegetation, presents a table of typical results from an ant-hill practical, and lists suggestions for further experiments. (GS)

Describes an attempt to plot the walking speeds of crowds as a Maxwellian velocity distribution in one dimension, analagous to an ideal gas approximation. (CP)

Describes a three day activity in which students divide into groups, each group arguing for the construction of a power plant using coal, oil or nuclear energy. (CP)