Presents an activity to articulate comparison of the hand and foot. Students carefully cut out corresponding hand/foot parts (carpals, tarsals, metacarpals, metatarsals, and phalanges) from enlarged diagrams and paste them on paper for comparative analysis. Sample student inferences and diagrams used for the activity are provided. (JN)

Describes demonstrations in which individuals participate in activities to illustrate physics concepts. No equipment other than the individuals participating is required. Demonstrations are provided for the topics of gas laws, thermodynamics, wave phenomena, optics, acoustics, kinematics, and dynamics. (JN)

Provides suggestions for teaching spatial relationships to preschool through primary age children, indicating that they need considerable firsthand experience to understand such relationships among objects. Several activities for teaching "opposites" and relative position are recommended, including the use of classroom puppets as vehicles for…

Several investigations can be undertaken with live sea anemones. A sea anemone's feeding response, fighting power, color, and symbiotic relationships to other invertebrates (such as a marine hermit crab) can be investigated in the high school classroom. Background information and laboratory procedures are provided. (Author/JN)

Provides instructions for producing a spectrum in the secondary science classroom. Offers suggestions for using the spectrum and discusses how to make a rainbow using a garden hose or houseplant sprayer. (JN)

Describes a simple and inexpensive pyrolysis gas chromatography (PGC) system constructed from items available in undergraduate institutions. The system is limited, accepting only liquid samples and pyrolyzing "on the fly" rather than statically and not allowing for reductive pyrolysis. Applications, experiments, and typical results are included.…

Describes modifications of a Nuffield experiment demonstrating oxygen transport by blood since the current experiment more often than not produces unsatisfactory results. Includes experimental modification, instructional strategy, assembly of equipment, and a brief discussion. (JN)

Presents science activities to help elementary children learn about water resources and home water conservation. A reproducible worksheet is included. (SJL)

Various activities using magnifying glasses are suggested to help young children understand the concept "bigger" and the implication of change involved when viewing different objects under magnifying glasses. (SK)

Procedures are outlined for a laboratory exercise in which students use a gravimetric method to determine the rate of transpiration in sunflower seedlings. Discusses the data in terms of the effectiveness of stomatal openings, mechanisms for water movement in plants, and the role of transpiration in the environment. (DC)

Describes an imaginary organism used to illustrate principles of genetics. The organism is easily drawn and suited to simple printing techniques, having been used to show independent segregation, partial dominance, linkage (sex chromosomes and autosomes), and in inheritance of autosomal gene lethal in the homozygous state. Additional exercises are…

Described is an experiment that explores the relationships between conscious motor activity and autonomic processes such as breathing, blood pressure, and heart rate. Procedures for the construction and calibration of ball ergographs are outlined. (CS)

Presents four science lessons based on food preparation: building an electric hot dog cooker; examining a microwave oven; discovering why popcorn pops; and making soda pop. (SJL)

Describes a procedure for the separation of coleus pigments using simple supplies and equipment from home and the supermarket. (MA)

Presents experiments to introduce students to the phenomenon of biological rhythmicity and to reinforce the fact that there are differences in the physiology of human beings. (Author/MA)