Explores some of the ways that lead is being replaced in the production of gasolines. Discusses the effects these changes are having on the chemical industry. Contrasts the use of ethyl alcohol from renewable sources with alcohols depending on the availability of isobutene. (TW)

Reports on a study of Canadian upper secondary science students' achievement of the concept of proportion. Results indicated that, in classes where the proportion content was emphasized by the teachers, higher achievement was demonstrated. (TW)

Describes a magic show designed to encourage young children in physics and chemistry. Discusses how a little "razzle-dazzle" can effect children positively. Tells how to organize and perform a magic show. Details six tricks that focus on principles of chemistry or physics. (CW)

Describes an algorithm that provides more rapid convergence for more complicated forms of phase separation requiring the use of a digital computer. Demonstrates that this "inside-out" algorithm remains efficient for determination of the equilibrium states for any type of phase transition for a binary system. (CW)

Describes an experiment designed to give accurate values for both the absolute zero of temperature and the gas constant using very simple apparatus. (TW)

Discusses the difficulties that some students have in understanding the concept of chemical reactions. Proposes that instructors try to consider the various difficulties during a chemistry course when students form their concepts of element conservation. (TW)

Describes two experiments in college chemistry which use microcomputers. One experiment deals with chemical oscillations, while the other involves colorimeter titration with laser excitation and computer-interfaced endpoint detection. (TW)

Describes several chemistry demonstrations that use an overhead projector. Some of the demonstrations deal with electrochemistry, and another deals with the reactions of nonvolatile immiscible liquid in water. (TW)

Editorially reviews the history of reform in science education from the 1920s to 1983. Highlights agreement among the various reports. Specifies the role of chemistry education in science reform. Announces a new book from the National Research Council, "Opportunities in Chemistry, Today and Tomorrow." (CW)

Presents a chronology of scientific efforts designed to determine the age of the earth. Summarizes scientists' attempts at dating the planet's formation, including the examination of lead in the environment, the calculation of the earth's cooling temperature and time, the study of geological sedimentation and the analysis of moon rocks. (TW)

Discusses the problem of serious dangers in current and backlist chemistry experiment books. Discarding of older books and careful evaluation of the dangers inherent in newer books are recommended. Safe alternatives are suggested, including some criteria for evaluating dangers, and a safer approach used by a current author. (EM)

Contends that demonstration lecturing is a valuable science teaching approach. Highlights the benefits of this technique and identifies sources of information for teachers. Provides a listing of popular science lectures suitable for chemistry classes. Describes in detail the "Major of Chemistry" demonstration. (ML)

Presents 26 activities, experiments, demonstrations, games, and computer programs for biology, chemistry, and physics. Background information, laboratory procedures, equipment lists, and instructional strategies are given. Topics include eye measurements, nutrition, soil test tube rack, population dynamics, angular momentum, transition metals,…

Presents eight separate articles on science education. Topic areas addressed include: an inservice course in primary science; improving physics teaching; reducing chemistry curriculum; textbook readability measures; school-industry link for introductory engineering; local education authority initiatives in primary school science; and "Winnie…

Indicates that the most dangerous laboratory hazards are the least dramatic ones and that hazardous chemicals are often used in laboratories without proper precautions. Selected sources of information essential for secondary schools and recommendations for safe practices and chemical use statistics from a study of Ohio high schools are given. (DH)