Discusses the use of the "extent of reaction" in teaching freshman honors classes of elementary chemistry to provide students with a unifying concept in the treatment of stoichiometry. Four sample problems are included. (CC)

Discusses a simplified Millikan oil-drop experiment which emphasizes the enplanation of basic concepts in mechanics and electrostatics, the use of home-made apparatus, the request for an individual's observation of his own drop, and the application of statistical analysis in data interpretation. (CC)

Describes the collisional properties as a logically essential component of the ideal gas model since an actual intraparticle process cannot support observable anisotropic velocity distributions without collisions taken into account. (CC)

Discusses the definition of the term weight'' in connection with fictitious forces occurring in accelerated frames of reference. (CC)

Presents current ideas about the fission process of the Moon, including loss of mass. Saturnian rings, center of the Moon, binary stars, and uniformitarianism. Indicates that planetary formation may be best explained as a destructive, rather than a constructive process. (CC)

Article concerns the criticism of an earlier article in this journal written by Professor Donald K. Darnell which focused on the direction the study of communication is taking. (RK)

Describes the errors in the sugar-cube experiment related to radioactivity as described in Project Physics course. The discussion considers some of the steps overlooked in the experiment and generalizes the theory beyond the sugar-cube stage. (PS)

Describes classroom activities to understand the evolution of elements as it occurs in the stars. Activities can be undertaken in groups. Explicit instructions and background materials are included. (PS)

Reproduced from Jista'', Journal of the Indian Scientific Translators Association, v1 n1 Mar 1972. (VM)

Axiology is a branch of philosophy devoted to worth." A unit of study is described utilizing group discussion in the developing of awareness in students of the value of scientific theories and their own standards of judgement as well as the standards of others. (Author/TS)

Reports study of grade five children for sequence in acquisition and hierarchy of behaviors using Elementary Science Study (ESS) Attribute Blocks. Results suggest failure to acquire simple behaviors may result in higher probability of failure in performance of more complex behaviors. (JM)

Presents definition, examples, and instructional ideas for secondary school science and mathematics teaching of concept of reliability in accuracy of measurement and dependability of performance. (JM)