Provided is an activity for student-constructed dichotomous keys that requires nothing more than a pile of shoes. Examples and directions are given. (MA)

Describes a college level exercise in physics for measuring the earth's resistivity. (SL)

Two demonstrations are described. Materials and instructions for demonstrating movement of molecules into cytoplasm using agar blocks, phenolphthalein, and sodium hydroxide are given. A simple method for demonstrating that the rate of diffusion of a gas is inversely proportional to its molecular weight is also presented. (AJ)

The relationship between tadpoles, algae and drinking water for wildlife is discussed. Six projects that students can do to learn more about the ecological benefits of tadpoles and frogs are described. A bibliography is included. (AJ)

Tips for raising and caring for spiders are given. Feeding habits, web spinning, and ecological relationships are discussed as possible areas for study during the school year. Directions for catching the spiders and making a home for them are included along with suggestions for food sources. (MA)

Examines children's need to develop the following reading skills for application to the area of science: reading formulas, technical science vocabulary, following directions in a lab manual, interpreting diagrams and drawings, and organizing facts into a hypothesis. (JK)

Provides complete Project WILD lesson plans for 20-45-minute experiential science learning activity for grades 3-7 students. Describes how students construct a simple food chain through examination of owl pellets. Includes lesson objective, method, background information, materials, procedure, evaluation, and sources of owl pellets and posters.…

Describes benefits of using the controlled environment of a museum field trip as a culminating nature study activity for kindergarten students. Suggests students prepare questions to ask at the museum and museum staff be made aware of any particular interests of the children. (NEC)

Provided is a flow chart for the separation and purification of major, minor, and accessory minerals from granitic rocks. With careful use of heavy liquids, and a Franz Isodynamic Magnetic Separator, it is possible to obtain mineral concentrates with a purity of 95 percent or better. (Author/RH)

Described is an experiment to investigate the plasticizer content in polyvinyl chloride (PVC) products. The experiment is designed for college students using an instrumental analysis laboratory. (RH)

Discusses discovery, types, and actions of pheromones in bees, ants, moths, and butterflies. Describes field activities for studying the presence and effects of pheromones on insect behavior. (NEC)

Suggests activities designed to introduce elementary school students to the idea of inherited traits. Discusses dominant and recessive genes, genotypes and phenotypes, and such traits as attached earlobes, tongue-rolling, and widow's peak. (DH)

Provides: (1) background information on features of the night sky and on how to observe them; (2) five activities; and (3) three ready-to-copy student materials. Activities include objectives(s), recommended age level(s), subject area(s), list of materials needed, and procedures. (JN)

Provides primary grade level science activities that focus on insects, tracks and trails, water, and flight. For each topic, six major ideas plus related activities and suggestions about resources are given. (RH)

Describes a laboratory study in which students evaluate, in ecological terms, different landscapes representing ecosystems under varying degrees of human domination. Also discusses the context within which the study is arranged. (JN)