Questions the current usage of the International System of Units (called SI units) in representing chemical notation and terminology. Suggests several additions to the system that relate to concentrations. Outlines new symbols for distinguishing between "concentration" and "molality." Includes tables to illustrate the proposed SI units. (TW)

Outlines a simple, inexpensive way of demonstrating electroplating using the reaction between nickel ions and copper metal. Explains how to conduct a demonstration of the electrolysis of water by using a colored Na2SO4 solution as the electrolyte so that students can observe the pH changes. (TW)

Provides background theory and an experiment relating to chemometrics. Describes the phenomenon where solutions are dichromatic or dichromic. Discusses the difficulty students have in describing such solutions that appear to be several different colors at the same time. (TW)

Discusses the importance of studying the far-from-equilibrium phenomena in college chemistry. Presents a system using the gas pendulum which displays all of the essential characteristics of dissipative systems. Promotes the use of the gas pendulum as a teaching example of a nonlinear far-from-equilibrium process. (TW)

Discusses the value of electrophoresis in the fields of protein chemistry and biochemistry. Describes how to build an inexpensive electrophoresis setup for use in either research or teaching activities. Details the construction of both the separating device and the power supply. (TW)

Presents a series of activities that use dinosaurs as a theme for teaching biological and geological concepts. The activities can be adapted for use with middle school through college level biology students. Exercises address such topics as: evolutionary relationships of vertebrates; Mesozoic ecology; animal tracks; and mineral replacement…

Describes a new software package for the Apple Macintosh computer which can be used to create elaborate simulation models in a fraction of the time usually required without using a programming language. Illustrates the use of the software which relates to water usage. (TW)

Includes the complete listing for a computer program which draws the best curve to fit calibration data obtained from a set of five standard solutions. (DH)

Explains the context in which courses aimed at improving problem-solving skills are implemented. Describes the structure and content of courses and evaluates activities designed to develop problem-solving skills, including a discussion of factors affecting students in their ability to perform. (JM)

Investigated were 74 programs in electronic engineering technology programs by program type: (1) 2+2 (associates and bachelors--same institution); (2) C4 (bachelors only); (3) 3+1 (three-year associates plus one for bachelors); and (4) +2 (bachelors after associates elsewhere). Describes subject requirements by group, focusing on mathematics.…

Presents the information and opinions obtained in a survey of the penetration made by technological and socio-economic aspects of science in English schools. Findings indicate that technological, social, environmental, and economic aspects received greater emphasis in further education institutions than in secondary schools. (ML)

Describes a lecture manual for an introductory soil course, how it is used by students, and how it affects student learning. Students indicated that the manual and its condensed lecture material, exam schedule, and grading procedures were beneficial to their learning in the course. (ML)

Describes a freshman chemistry experiment designed to introduce scientific methodology, provide practice in measurement skills, and illustrate a fundamental chemical relationship (conservation of volume). Provides the experimental design, a materials and equipment list, sample calculations, and results. (JM)

Describes a simple method for determining self-inductance of non-ferromagnetic rings. Suggests fitting the ring with an auxiliary coil and using a solenoid driven with a known frequency alternating current. Amplitude change and phase shift can be measured and used to calculate inductance. Material list, calculations, and sample results are given.…

Background information, list of materials needed, and procedures used are provided for a simple technique for generating mechanically plotted acid-base titration curves. The method is suitable for second-year high school chemistry students. (JN)