Describes three methods used in the calculation of height in a high school curriculum package for rocketry. Discusses some assumptions in the approaches. (JRH)

Describes the manufacturing of ethanol, the effects of ethanol on the body, the composition of alcoholic drinks, and some properties of ethanol. Presents some classroom experiments using ethanol. (JRH)

Describes an alternative technique for determining the molar volume of hydrogen from the metal-acid reaction in which the metal sample is encased in a specially prepared cage and a pipette filler is used to fill an inverted burette with water. Eliminates some difficulties encountered with the conventional technique. (JRH)

Describes techniques for the preparation of simple soaps and detergents that can be used, by students, to investigate their properties and the differences between the two classes of compounds. (AL)

Describes a very simple and effective method of DNA extraction from dried peas. Presents information on the Green Machine Science Education Center that promotes education in gene technology. (JRH)

Provides suggestions for the compilation of cards on which science activities are outlined for student use. (MLH)

Described is the use of calculators in two experiments. In the first, students determine the relative atomic mass of magnesium. In the second, students use a calculator to determine a constant for gaseous concentrations of two reactants and the product at equilibrium. (AJ)

Two demonstrations are described. Materials and instructions for demonstrating movement of molecules into cytoplasm using agar blocks, phenolphthalein, and sodium hydroxide are given. A simple method for demonstrating that the rate of diffusion of a gas is inversely proportional to its molecular weight is also presented. (AJ)

Reports on research that has identified an appropriate policy model for emergency anticipation in high schools that was developed from an analysis of the literature and the law. Presents a model emergency anticipation policy for high schools together with policy statements in first aid, respiratory equipment, fire, chemical storage, and waste…

A sample run of a program intended for use by students with access to a teletype or visual display computer is shown. The program is satisfactory for the testing of the law for up to about 20 generations using any valid set of frequencies for genotypes. (AJ)

Discusses the advantages and disadvantages of selecting coastal sand dunes as the location for field ecology studies. Presents a descriptive zonal model for seaboard sand dune plant communities, suggestions concerning possible observations and activities relevant to interpreting phenomena associated with these forms of vegetation, and additional…