Discusses the use of an ideal gas model to explain osmotic equilibrium and nonequilibrium flows through an ideal semipermeable membrane. Included are a justification of the relationship between an ideal gas and a dilute solution, a review of the irreversible thermodynamic flow, and some sample applications to physiology. (CC)

Reports a study of difficulties encountered by 14.5- to 15.0- year-old children in learning the mole concept with a programed instruction. Concludes that three respective disturbing factors were embedded in manipulation of molarity of solutions, balancing equations, and misapprehension that one mole of a compound always reacts with one mole of…

Discusses theories underlying man's conceptions of the universe, including Omnes' repulsive separation mechanism, the turbulence theory of galaxy formation, and the author's idea about gamma ray spectra in cosmological matter-antimatter annihilation. Indicates that the Apollo data provide encouraging evidence by fitting well with his theoretical…

Discusses roles played by inelastic molecular collisions in gas molecular theories and suggests the inclusion of inelastic aspects in the freshman chemistry course. (CC)

Presents three points of view on the notion of space as taught and perceived in elementary geography classes in France, Canada, and the United States. (DS)

Summarizes research studies made early in this century in the fields of cellulose, starch, proteins, and rubber. Included is a description of factors which give rise to the concept of very long, chain-like molecules. (CC)

Bernoulli's Theorem yields information on what goes on inside a fluid while Newton's Third Law explains the external encounter, such as a lift-producing encounter between air and a wing. (DF)

Article describes excerpts of writings of the late Richard Attygalle who comments on the individual as he attempts to utilize his countries' resources and develop his educational and social awareness in an Asian community. (RK)

Questions the conclusions drawn in the article by Billeh and Pella (EJ 023 200), and suggests that there are real differences between the attainment of concepts by Jordanian and American students. (AL)

Reports the results of testing 143 college freshmen on the meaning of density. Relates reasons for student inability to conceptualize density to the hierarchy of experiences which leads to the understanding of the density concept. (PR)

Describes a feasibility study in which pre-school deaf children were taught some science concepts to help increase their language development. Some evaluation data are reported. (AL)