Discusses kinematics of the planetary alignment in nature and related results. Describes a model of planetary alignments to beginning astronomy students. The model is to explain Jupiter's deviation from a circular orbit. (SK)

Describes an experiment in which a simple laser-based apparatus is used for measuring the change in refractive index during the acid-catalyzed hydrolysis of glycidol into glycerine. Gives a schematic of the experimental setup and discusses the kinetic analysis. (MVL)

Discusses an enzyme kinetics laboratory experiment involving a two substrate system for undergraduate biochemistry. Uses the enzyme gamma-glutamyl transpeptidase as this enzyme in blood serum is of clinical significance. Notes elevated levels are seen in liver disease, alcoholism, and epilepsy. Uses a spectrophotometer for the analysis. (MVL)

Play involves unstructured activity that is freely entered into and intrinsically rewarding. When children engage in play there is little intentional learning. There are no lesson plans. There are no daily objectives or specific learning outcomes. Incidental learning can cause relatively permanent changes in the way one thinks; accidental learning…

Trypsin and soybean trypsin inhibitor (Kunitz inhibitor) can be used in a relatively simple and inexpensive student exercise to demonstrate the usefulness of enzyme kinetics. The study of enzyme kinetics is essential to biology because enzymes play such a crucial role in the biochemical pathways of all living organisms. The data from enzyme…

Describes three situations in which computer software was used in a chemistry laboratory. Discusses interfacing voltage output instruments with Apple II computers and using spreadsheet programs to simulate gas chromatography and analysis of kinetic data. Includes information concerning procedures, hardware, and software used in each situation. (CW)

Reviews software produced by Cross Educational Software to teach college-advanced high school students how to determine forces/torques acting on rigid bodies in static equilibrium. Designed for use with Apple II/II+ (Applesoft), 10 minutes to one hour are required for the five low to moderate interactive tutorial programs. (Author/JN)

Describes use of the Physical Science Study Committee (PSSC) physics timer for verification of equations of motion and in measuring moment of inertia when a body is in actual motion. Diagrams illustrating experimental arrangement of apparatus for the experiments are provided. (JN)

A method is presented for teaching some topics of kinematics. It involves the use of electronic equipment, which allows active student participation, the systematic analysis and solution of problems, and the use of a quick feedback loop for training. (Author/SK)

Following a comparison of chain-growth and step-growth polymerization, focuses on the latter process by describing requirements for high molecular weight, step-growth polymerization kinetics, synthesis and molecular weight distribution of some linear step-growth polymers, and three-dimensional network step-growth polymers. (JN)

Presents background information, procedure, and results of an experiment, using easily obtainable chemicals and equipment, illustrating chemical kinetics. The experiment may be done in a letter as one four-hour physical chemistry laboratory period. (JN)

Describes a project in which elementary students develop their science understanding and literacy skills by developing their own book on the topics of solids, liquids, and gases. (WRM)

Provides an art project for use with eighth-grade students, who choose a work of art and recreate it in an interpretive and informative manner. Explains that students re-create the background of the artwork and then the students become a part of the painting via characters or objects. (CMK)

Reviews software package for college advanced high school physics. The package, for Apple microcomputers, contains programs instructing students on how to analyze motion of objects under a variety of circumstances. Programs include graphing motion, one-dimensional kinematics, gravity problems, projectile, dynamics (general method), motion on…

Compares the magnitude of the proper acceleration of a static observer in a static, isolated, spherically symmetric space-time region with the Newtonian result including the situation in the interior of a perfect-fluid star. This provides a simple physical interpretation of surface gravity and illustrates the global nature of the event horizon.…