Described are the theory and operation of Van De Graaff generators. The experience of one group of people in the reconditioning and repair of their apparatus is discussed. (CW)

The advantages of microchemistry in terms of economics and safety are discussed. A list of six companies known to supply apparatus and reagents for microscale experimentation is provided. (CW)

To avoid a tedious task for recording temperature, a computer was used for calculating the heat of crystallization for the compound sodium thiosulfate. Described are the computer-interfacing procedures. Provides pictures of laboratory equipment and typical graphs from experiments. (YP)

Describes the current use of automation in the laboratory. Discusses the need, flexibility, and benefits of automation. Presents a generic system description. Lists commercially available laboratory robots. (MVL)

Discusses the making of a light engine powered by sunlight or a lamp. Describes the materials and construction method with detailed specifications and diagrams. (YP)

Presents a programed method that inventories and classifies hazards. 8iscusses the following topics: (1) student and hazard source, (2) elimination of the source, (3) adaptation of the source, (4) isolation of the source, (5) adjustment of the surroundings, (6) isolation of man, and (7) personal protective equipment. (MVL)

Describes an inexpensive spectrum projector that makes high-dispersion, high-efficiency diffraction gratings using a holographic process. Discusses classroom applications such as transmission spectra, absorption spectra, reflection characteristics of materials, color mixing, florescence and phosphorescence, and break up spectral colors. (MDH)

Describes the use of a particle detector, an instrument that records the passage of particles through it, to determine the mass of a particle by measuring the particles momentum, speed, and kinetic energy. An appendix discusses the limits on the impact parameter. (MDH)

The heat content of a food at a given temperature can be described by the thermodynamic property of enthalpy. Presents a method to construct a simple calorimeter for measuring the enthalpy changes of different foods during freezing. (MDH)

Describes a concrete teaching model designed to eliminate students' misconceptions about current flow in electrochemistry. The model uses a semi-permeable membrane rather than a salt bridge to complete the circuit and demonstrate the maintenance of cell neutrality. Concludes that use of the model led to improvement in students' understanding at…

Any effort to reform science education in the schools must include input from the nation's science teachers concerning what they need to do in order to improve instruction and student performance. Science teachers in rural schools have many needs that differ from those in more urbanized areas. A survey of science teachers in Arkansas, Illinois,…

Based on the assumption that most students have a natural curiosity about the plant and animal life residing in the oceans, this document provides students in grades five through eight with activities in marine biology. The book provides illustrated information and learning activities dealing with: (1) diatoms; (2) the life cycle of the jellyfish;…

This report presents information for identification of the national trends in the amount, age, loss, condition, and perceived adequacy of academic research equipment in selected science and engineering fields. The data were obtained from a stratified probability sample of 55 colleges and universities and from a separately selected sample of 24…

According to the General Accounting Office (GAO), scientific leaders estimated in 1982 that between $1 and $4 billion was necessary to update university research equipment. Because of this large cost variance, GAO was requested to assess how well past studies have defined the nationwide deficiency in university research equipment and to suggest…

This unit, one of a series designed to develop and foster an understanding of the marine environment, presents marine science activities for second grade students. The unit, focusing on awareness of living/non-living factors shaping life of the sea, is divided into sections dealing with: physical characteristics of oceans; fish; sea anemone;…