Summarizes the development of a new analytical technique on the basis of the interaction of alpha particles with matter and its applications to three Surveyor missions and other space investigations. Discusses the implications of the alpha-particle instrument findings for the nature of the Moon. (CC)

Discusses theories underlying the phenomena of solution viscosities, involving the Jones and Dole equation, B-coefficient determination, and flickering cluster model. Indicates that viscosity measurements provide a basis for the study of the structural effects of ions in aqueous solutions and are applicable in teaching high school chemistry. (CC)

Discusses the use of simulation games and real-life "role models" to teach introductory chemistry to a class, mostly of biology and engineering majors. Included is a suggested time schedule for a role-playing exercise. (CC)

Study was conducted to compare effects of pass/fail and conventional five point grading systems on student achievement, teaching practices, teaching techniques and student attitudes. The sample consisted of eight sections of chemistry students. Analysis of data indicated lower achievement scores and poorer attitudes of students on pass/fail…

Studied effectiveness of teaching conservation of chemical identity, composition, and mass to 12 boys and 11 girls of ages ranging from 11.11 to 12.10, using techniques analogous to Piaget's. Indicated the necessity of course re-examination to facilitate attainment of conservation concepts. (CC)

Several ideas are proposed for chemistry teachers to try in their classrooms. Subjects included are polymerization of acrylate, polymerization of styrene, conductivity, pollution, preparation of chlorine, redox equations, chemiluminescence, and molecular sieves. (PS)