Describes three experiments (also useful as demonstrations) using a "thorium cow," a device which concentrates the daughter products from thorium compounds by precipitation on a charged electrode. (JN)

A chromatographic procedure for analyzing organophosphorus pesticides (such as PCB's, nitrosamines, and phthalate esters) in orange juice is described, including a summary of the method, instrumentation, methodology, results/discussion, and calculations. (JN)

Provides information on collecting and maintaining termites and for using these insects in behavioral studies (trail following, recognition, food choice, reproductive behavior, and behavior in a magnetic field) and termite control experiments (preventive construction techniques, termite repellents, using soil or wood pretreatment, and the bait…

Describes an inexpensive (about $1,500) direct-readout ground station for use in secondary school science/mathematics programs. Includes suggested activities including, among others, developing map overlays, operating station equipment, interpreting satellite data, developing weather forecasts, and using microcomputers for data storage, orbit…

Provides procedures for growing from spores to demonstrate alternation of generations, life history, and morphology of pteridophytes. (CS)

Describes a simulation drilling core activity involving the use of a physical model from which students gather data and solve a three-point problem to determine the strike and dip of a buried stratum. Includes descriptions of model making, data plots, and additional problems involving strike and dip. (DS)

Describes the first Biology Olympics for high school teams which took place at Slippery Rock State College, Pennsylvania. Individual events are described as well as the visitation day program for nonparticipants. (SA)

Reviews materials and activities of "From the Inside Out," a nutrition and fitness program for children ages 10-13. Also reviews "Wildlife in Your World," the first set in a series of activity kits from the National Wildlife Federation. (SK)

Discusses the teaching of world hunger in the classroom. Controversial questions and map skills for students are discussed as well as activities for home economics and science classes. A list of resource materials is included. (AM)

Summarized are general procedures for and student reactions to three different science units for primary students. Topics included are timing things, yogurt pot telephones, and parachutes. (DC)

A set of instructions for growing algae successfully in the classroom and maintaining the culture is provided. Aids for identification of freshwater organisms are suggested. (SA)

Discusses how linguists determine relationships of languages and group them into a family. Presents a crossword puzzle as a student activity, suitable for science and other classes, to determine the Indo-European roots of English words by a comparative method. (SK)

Reviews methods for obtaining accurate and reproducible results in determining zonation patterns on rocky shores. (CS)

Describes an activity center where students work independently on problem-solving tasks. Participants keep records of their work and share ideas of activities with the class. Includes a list of tasks for the activity center. (MA)

Presents thirteen concepts about water and suggests science activities for each. Designed as early childhood learning experiences. (MA)