Discusses theories underlying Newtonian and non-Newtonian fluids by explaining flow curves exhibited by plastic, shear-thining, and shear-thickening fluids and Bingham plastic materials. Indicates that the exact mechanism governing shear-thickening behaviors is a problem of further study. (CC)

Summarizes the thermodynamics of macromolecular systems, including theories and experiments of cyclic energy conversion with rubber and collagen as working substances. Indicates that an early introduction into the concept of chemical potential and solution thermodynamics is made possible through the study of the cyclic processes. (CC)

Discusses the historical rod contraction-block retardation (RC-CR) ether theory to illustrate its relationship to the special theory of relativity and the possibility of experimental differences between them. Indicates that the RC-CR theory is worthy of the attention of both physicists and science philosophers. (CC)

Article discusses the best way to build a background of familiarity and an attitude of readiness for science learning. (Author/RK)

Specific suggestions are given for activities which will interest young children and help them develop important skills basic to intellectual development. The emphasis is on involvement with materials as a method of learning." (Editor)

Describes an elementary school science activity related to telling time by apparent star motion. Directions are given for construction and use of a Polar Dial" to determine local sidereal time. Methods of conversion to local civil time and standard time are given. (JM)