Outlines the objectives, materials, and procedures in performing a student laboratory experiment that demonstrates sodium transport in frog skin. (CS)

Presents three different procedures in which reagents are added in a specified order to a large beaker containing an aqueous solution of nickel sulfate. Complex ions of nickel (II) are prepared by using aqueous solutions of ammonia, ethylenediamine, dimethylglyoxime, and cyanide ion. (CS)

Highlights important 1983 news stories reported in Science News. Stories are categorized under: anthropology/paleontology; behavior; biology; chemistry; earth sciences; energy; environment; medicine; physics; science and society; space sciences and astronomy; and technology and computers. (JN)

Provides sample output and describes a program for programmable calculators that determines the molecular parameters of any type of diatomic molecule. (CS)

Summarizes common practices designed to promote safety consciousness in high school chemistry laboratories. (CS)

Provides instructions for setting up an indoor pond for the elementary school classroom. (CS)

Demonstrates how depth of field, exposure correction, and Scheimpflug focusing are obtained for a view camera, using elementary optics. (CS)

Reviews development in electronics technology of digital computers, considering the binary number representation, miniaturization of electronic components, cost and space requirements of computers, ways in which computers are used, and types of computers appropriate for teaching computer literacy and demonstrating physiological simulation. (CS)

Reviews ways in which programable pocket calculators are used in chemical education. Discussed are simulations of chemical experiments, performance of repetitive calculations, processing chemical data directly from instruments, testing hypotheses, and monitoring class practical results. Lists some calculators and their features and some useful…

Discusses errors and misleading statements found in discussing the meaning of the minus sign in treating the topics of the conservation laws of energy, momentum, and angular momentum. (CS)

Describes various procedures applicable to secondary school science classes, including: (1) constructing a centripetal accelerometer; (2) demonstrating weightlessness with a small scale apparatus employing a catapult; (3) teaching hexadecimal counting by using the fingers; (4) demonstrating oscillation and resonance in tuned circuits. (CS)

Presents information concerning a fundamental concept for understanding reaction rate, the idea of a rate-limiting step for a chemical reaction. Discusses problems in using flow analogies and introduces an alternative approach to finding the rate-limiting step based on locating the transition state of highest energy. (CS)

This teacher's guide is designed to provide elementary teachers with an assortment of classroom activities dealing with the Mt. St. Helens eruption of May 18, 1980, in the areas of science, social studies, math, language arts, and school newspaper activities. Copy masters and teacher versions of all activities are contained with this guide,…

Since the major causes of accidents are carelessness and a negative or apathetic attitude towards safety, this guide was developed to facilitate safe, stimulating science laboratory activities by providing both general and specific safety information presented in 12 sections. Subject areas considered in these sections include: 1)…

Reviews apparatus design and instructional uses for Fume Cupboard Monitor, Plant Tissue Culture Kit, various equipment for electronic systems course, Welwyn Microprocessor-Tutor, Sweep Function Generator SFG 606, and Harris manufacturers materials--Regulated Power Supply Units, Electronic Current and Voltage Meters, Gas Preparation Kit, and…