Describes a Star Party which involves comparing the different colors of the stars, demonstrating how astronomers measure the sky with degrees, determining the cardinal direction, discussing numerous stories that ancient civilizations gave to constellations, exercising science process skills, and using science instruments. (JRH)

Presents activities that allow students to explore the fundamental but poorly understood concept of diffusion by appealing to their kinesthetic senses first, then challenging their analytical skills as they try to deduce the mathematical principle involved. Presents a computer simulation of diffusion and discusses diffusion's limitations and…

This paper discusses some of the results of a study conducted in Papua New Guinea on students' comprehension of 45 non-technical words used in science classes. Four words, "component,""devise,""exert," and "random," are considered in detail. (CW)

Described is the relative complexity of commonly used diagrams in science instruction. Student interpretations of diagrams, implications for science instruction and the prevention of science misconceptions is discussed. (CW)

A demonstration which illustrates the concept of electric potential using electrophorous is presented. Equipment and procedures for the demonstration are discussed. (CW)

Discussed is the importance of valence bond theory on the quantum-mechanical theory of chemical structure and the nature of the chemical bond. Described briefly are early VB theory, development of VB theory, modern versions, solid-state applications, models, treatment in textbooks, and flaws in criticisms of valence bond theory. (KR)

Described are the results of interviews of students regarding the concepts of "forced" and "natural" motion. Aristolean-like beliefs have been found to persist in students even though these views differ from orthodox physics views. (KR)

Investigated are the alternative conceptions of the concept "animal" held by African youngsters. Three forms of thinking among the pupils are identified. An attempt is made to explain the possible origin of anthropocentric thinking among pupils. Urban and rural groups are compared. (CW)

Gives a brief account of fluoropolymers as an important part of polymer chemistry and attempts to make the topic relevant to the secondary school audience. Provides general characteristics and applications for fluoropolymers. (MVL)

Describes an undergraduate biochemistry laboratory experiment on enzyme kinetics using the D-amino acid oxidase system and an ammonia electrode. Preparation of an ammonia standard curve, a sample preparation, and inhibition studies are discussed. (YP)

Described are features of a theoretical model for fluid pressure. Analyzes six introductory physics textbooks based on an introduction and meaning of the pressure concept; characteristics of pressure; and liquid as a pressure transmitter. Presents three models of pupils' conceptions. (YP)

Indicates and describes items that are incorrect in textbooks and a teacher edition of Discover SCIENCE for K-6. (YP)

Describes apparatus for Doppler demonstrations. Provides several pictures of the apparatus and ways it could be used. (YP)

Presented is an astronomy activity in which students use an apparatus to illustrate the various positions and movements of the sun, earth, planets, stars, and constellations. A test of the heliocentric theory of the solar system is included. (CW)

Describes the teaching practices of one exemplary physics teacher. Identifies those teaching practices which can be considered exemplary and worthy of attention and analysis by physics teachers and teacher educators. Reports four assertions by the data from observations and interviews with teachers and students. (YP)