The interfacing of a physical pendulum to an Apple IIe computer and the physic instruction associated with it are discussed. Laboratory procedures, software commands, and computations used in this lesson are described. (CW)

Described is a simple technique to monitor air pollutants and to simulate some of the features of roadside canopies. Included are the procedures, directions for the assembly of the apparatus, and a discussion of typical results. Graphs of sample data are presented. (CW)

Described is a laboratory experiment that can be used to investigate bacterial survival in soil or water as well as the study of genetic transfer via conjugation. Discussed are materials, laboratory procedures, typical results, and a list of six references. (CW)

Described are the uses of a spreadsheet program to compute the free energy change associated with a reaction; to model acid/base equilibria; and to solve equilibrium constant expressions. Stressed are the advantages derived from having the spreadsheet perform the multiple, trivial calculations. (CW)

Presented is a simple laboratory set-up for teaching microprocessor-controlled data acquisition as a part of an instrumental analysis course. Discussed are the experimental set-up, experimental procedures, and technical considerations for this technique. (CW)

Developments in microscale chemistry which have occurred in the late 1980s are reviewed. Possible directions for the future concerning the uses of microscale chemistry in organic, general, and high school chemistry are suggested. Twenty-three references are listed. (CW)

Presented is a method of constructing a wide variety of molecular models from inexpensive, durable materials. Equipment, supplies, atomic sizes, bond lengths and bond angles, assembly, and painting are discussed. (CW)

Proposes an approach to school laboratory experiences which leads to gradual acquisition of inquiry skills based on the idea of advance organizers. Presents a design which is context familiar and can serve as an introduction to scientific inquiry. Discusses student achievement, and teacher and student attitudes. (CW)

Presents four Physics General Certificate of Secondary Education assessment practicals which can be photocopied for use in instruction. Includes notes for guidance of teachers in determining student skills in management and organization, designing and carrying out experiments to solve problems, draw conclusions, and select suitable apparatus for…

Describes two oscillating reactions: the Briggs-Raucher reaction using H202, KIO3, malonic acid, and MnSO4 which changes from yellow to blue, and the Belousov-Zhabotinskii reaction uses NaBrO3, NaBr, malonic acid, and ferroin solution and changes from red to blue. Includes a third color demonstration on the six oxidation states of manganese. (MVL)

Describes the methods and materials used to obtain satellite pictures from weather satellites. Discusses possible physics lessons which can be done using this equipment including orbital mechanics, and how the satellite works. (CW)

The production of science textbooks and the processes whereby both producers and consumers can work to improve them are described. Included are discussions of selection at the state level and a publishers perspective, and six textbook experiments at different levels from different publishers. (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)

An approach to teaching the properties of the elements and their arrangement in the periodic table is suggested. Discussed are symbols for the elements, format of the table, and coding the properties of the elements on the table. (CW)

A brief history of several of the early forms of the periodic table of the elements are discussed including those of Mendeleev, Meyer, Hubbard, Gmelin, Von Antropoff, and Strong. A more every-day-life form of the table is presented. (CW)