Describes an exercise that teaches Mendelian inheritance using human traits which students find exciting and relevant. (LS)

Describes an experiment, using a soap bubble raft, intended to provide insight into the orderly packing of spherical objects and the properties of metallic crystals. Also describes a solubility product experiment which uses barium hydroxide. (MLH)

The use of atomic absorption techniques to determine heavy metals in trace amounts is demonstrated by analyzing a solution of human hair digested in nitric acid. (MLH)

Describes qualitative and quantitative experiments using ion exchange columns; after introductory exercises the students determine the total ion concentration in sea water and blood plasma. (MLH)

Describes a method in which the effect of impurity ions in the dielectric is taken into account in the operation of the Kerr cell. (Author/CP)

Describes in detail a program utilizing the study of marine biology to motivate students. (LS)

Offers an approach to the analysis of ecology oriented advertising based on the Essentia Project of the American Geological Institute (ESSENCE) model. Suggests several classroom activities to be done with this topic. (CP)

The stoichiometry of the reaction between potassium chromate and barium chloride is determined by analysis of precipitates by mixing various amounts of both solutions. (GS)

Describes an experiment in which the beam of X-rays is simulated through the use of a laser as a monochromatic light source and the crystal is replaced by photographically prepared masks. A strong diffraction pattern as large as 20 cm. can be obtained. (GS)

Describes an activity for biology students designed to involve them in working with the National Park Service in the determination of the effects of fire on black oak reproduction and subsequent survival. (PEB)