The Apple II microcomputer program described allows instructors with minimal programing experience to construct computer models of psychological phenomena for students to investigate. Use of these models eliminates need to maintain/house/breed animals or purchase sophisticated laboratory equipment. Several content models are also described,…

Describes the collection and culturing of microscopic molds that feed mainly on tiny nematodes in the soil. Includes bibliography. (MA)

Describes an experiment in which a recycling oscillator has been designed having a fiber optic data link that closes the loop. Outlines the use of this wink-around system to determine the speed of light and suggests additional application for measuring integrated circuit propagation delays to subnanosecond resolution. (GS)

Using the hydrolysis of crystal violet dye by sodium hydroxide as an example, the theory, apparatus, and procedure for a laboratory demonstration of tubular reactor behavior are described. The reaction presented can occur at room temperature and features a color change to reinforce measured results. (WB)

Notes how laboratory experiences can help elementary school social studies pupils understand concepts such as cultural awareness, career education, advertising techniques, map and globe skills, music, transportation, and landforms. For each concept, information is presented on objectives, activities within a laboratory setting, and evaluation…

Suggests that differential rearing conditions may cause significant reversals in sex-related ability and behavior (maze learning and exploration), and may significantly affect perceptual sensitivity. (RL)

An exercise is presented which demonstrates the determination of sample purity by differential scanning calorimetry. Data and references are provided to enable the exercise to be carried out as a dry-lab experiment. (BB)

Presents the use of a Michelson interferometer in studies of visible spectroscopy. Discusses the experimental setup for obtaining reflectivity spectra of various semiconducting materials. (MLH)

Describes an experiment that utilizes fluorescence intensity measurements from a Spectronic 20 to determine the rate constant for the fluorescence quenching of various aromatic hydrocarbons by carbon tetrachloride in an ethanol solvent. (MLH)

Presents short articles on: Le Chatelier's principle, the Lennard-Jones potential, chemical oscillations, solvent extraction efficiency, and nuclear magnetic resolution spectroscopy. (MLH)

Describes a reproducible wet technique for determining lead content of gasoline quantitatively or semi-quantitatively in three hours. (MLH)

Describes a simple experimental setup in which the student can detect and record light spectra, study and test the concept of Bragg reflection, and measure the anisotropy of the index of refraction in a cholesteric liquid crystal. (MLH)

Describes interfacing a hand-held oxygen probe with a microcomputer and suggests experiments for undergraduate chemistry courses that could facilitate student understanding of aquatic environmental processes which involve dissolved oxygen. Data can be analyzed through the program or exported into other software. Presents results of an experiment…

Presents simple laboratory experiments to help students understand the principle of buoyancy and mass balance. Buoyancy experiments can simulate lithospheric mass balance, crustal loading and unloading, and can be used to model differences between the oceanic and continental lithosphere. (MKR)