Includes latest theory concerning the flight of the returning type of boomerang. Some comparisons in aerodynamics are made between returning and non-returning boomerangs. (CS)

Proposes that caution be used against generalities and improper terminology in the description of structure and function relationships. (CP)

Outlined and described is Whittaker's five-kingdom system of classifying all living organisms. Advantages of this classification scheme are discussed. (CS)

Visual environment is a neglected area of study in secondary science. Investigates the structure of science classrooms, display materials used, and components of the science curriculum including information on the sex and subject specialization of staff involved with teacher trainees. (Author/YDS)

Compares differences in function and behavior of two oxygen-binding proteins, myoglobin found in muscle and hemoglobin found in blood. Describes the mechanism of oxygen-binding and allosteric effect in hemoglobin; also describes the effect of pH on the affinity of hemoglobin for oxygen. (CS)

Provides a detailed discussion of the qualities of glass membrane, solid state, liquid membrane, and other types of ion-sensing electrodes. (CP)

Presents an outline of lectures given on this topic to British secondary students. Man's various ideas about the origin of life are included in three categories: those that consider life to have been created by a Divine Being; those that consider life to have developed from non-living matter; and those that consider life to be eternal. (MLH)

Traces the history of solar energy development. Discusses global effects (temperature, particle and other pollution) of burning fossil fuels. Provides energy balance equations for solar energy distribution and discusses flat plate collectors, solar cells, photochemical and photobiological conversion of solar energy, heat pumps. (CS)

Presents experiments, demonstrations, activities and ideas relating to various fields of biology to be used in biology courses in secondary schools. Among those experiments presented are demonstrating the early stages of ferns and mosses and simple culture methods for fern prothalli. (HM)

Presents experiments, demonstration, activities and ideas relating to various fields of physics to be used in physics courses in secondary schools. The use of a programable pocket calculator in A-level physics courses is among the activities described. (HM)

A discussion of levers, moments of inertia, fulcrums and forces involved in the action of boat rowing is presented. (CP)

Includes methods for determining melting and boiling points, illustrating the Finkelstein reaction, choosing acid-base indicators, growing perfect NaC1 cubes and "whiskers," bromination of alkenes, using vanadium in the laboratory, preparing phenylamine-copper (II) sulfate (VI) complex, simulating first-order chemical kinetics on a programmable…

Includes methods for demonstrating Schlieren effect, measuring refractive index, measuring acceleration, presenting concepts of optics, automatically recording weather, constructing apparaturs for sound experiments, using thermistor thermometers, using the 741 operational amplifier in analog computing, measuring inductance, electronically ringing…

Includes methods for using harmonographs in demonstrating motion of pendulums, constructing an electrostatic "bell," inverting mirror images, demonstrating the corrosion rate of steel, demonstrating expansion, studying rate of reaction between magnesium and hydrochloric acid, using matchboxes in science for containers, problem boxes, building…

Describes the technique and benefits of having physics students practice connecting paper models of electric circuits before attempting to use real ones. (WRM)