Provided is a high school activity in which students observe the filter feeding of barnacles and the effects of a variety of changing parameters upon their feeding process. Includes list of materials needed and procedures necessary to accomplish the activity. (JN)

To make material on Raoult's law more meaningful, students complete exercises on paper, in the laboratory, and with molecular models. Paper exercises give practice using the law; laboratory work illustrates behavior of real solutions; and models show relationships between properties of individual molecules and of matter in bulk. (JN)

Discusses concepts that can be taught using bicycles. Includes examples of activities/experiments using these devices as well as suggestions for their use as research tools for student projects. One area of investigation suggested is an examination of variables that determine the speed at which a bicycle moves. (JN)

Provides a list of needed materials, required preparations, and instructions for demonstrating the dyeing of anodized aluminum. Discusses the chemistry involved and gives equations for reactions occurring at the anode and cathode. (JM)

Suggests that ideal experiments fit into course time constraints and be meaningful, relevant to course content, safe, inexpensive, simple, reproducible, and easy to set up/maintain. Describes a Boyle's Law experiment that uses a minimum of equipment and meets the foregoing criteria. Apparatus used, procedures, and safety precautions are…

Investigated application of binomial statistics to equilibrium distribution of ester systems by employing gas chromatography to verify the mathematical model used. Discusses model development and experimental techniques, indicating the model enables a straightforward extension to symmetrical polyfunctional esters and presents a mathematical basis…

Describes an experiment enabling students to apply concept of diffraction, determine limits of their color perception, learn how to measure wavelength with a simple apparatus, observe continuous and line spectra, and associate colors with corresponding wavelengths. The homemade diffraction-grating spectrometer used is easily constructed. (JN)

Describes an advanced high school/college experiment that illustrates the mechanics describing the motion of a rolling ball. Includes procedures used, discussions of vectoral and mathematical (calculus) solutions to the investigation, and sample student results using the recommended materials. (JM)

Two descriptive chemistry experiments are presented which foster development of students' skills in making observations and deductions. In addition, the experiments are designed to stress the importance of chemical behavior and clear presentation of experimental findings. (JN)

Describes an inexpensive device (around $8.00) for measuring light. The circuit used includes five resistors, three small capacitors, a cadmium sulfide light sensor, two integrated circuits, and two light-emitting diodes. The unit is constructed on a small perforated circuit board and powered by a 9-V transistor radio battery. (JN)

Describes major features of a computer-operated, cybernetic potentiostat and the development, design, and operation of the software in ROM. The instrument contains control circuitry and software making it compatible with the static mercury drop electrode produced by EG&G Princeton Applied Research Corporation. Sample results using the…

Presents background information and procedures for producing sequential color reactions. With proper selection of pH indicator dyes, most school colors can be produced after mixing colorless solutions. Procedures for producing white/purple and red/white/blue colors are outlined. Also outlines preparation of 2, 4, 2', 4',…