Describes a technique of quantitative analysis based on measuring the temperature change accompanying a quantitative reaction in solution. Can be used for delta-H measurements and quantitative determinations by comparison of data obtained for an unknown with that obtained for a series of standards. (SLH)

Describes a procedure for freeing an element from either a mineral or organic matrix with the use of a radioactive tracer to determine recovery of the elements. (SLH)

Outlines simple statistical procedures that may be effectively used in several ecology exercises suitable for secondary school science classes. (JR)

Describes how a cemetery can provide a multidisciplinary learning experience for students and can lead to the discovery of many concepts in human ecology. (JR)

Presents a series of activities which focus on the study of the physical characteristics of water, including temperatures, opacity, pH-values, oxygen concentrations, reagents, and free CO2 concentrations. Indicates that ponds can provide the students with opportunities to learn chemistry, geology, biology, botany, and the effects of weather. (CC)

Describes an experiment in which rat adipose tissue samples are exposed to labeled glucose; insulin is added to one sample. Subsequent scintillation counting demonstrates the ability of insulin to facilitate the entry of glucose into the tissue. (MLH)

In this simple experiment for an undergraduate laboratory a laser beam is passed through the mixing zone of two liquids with different refractive indices. The spatial variation of the refractive index, at different times during the mixing, can be determined from the observed deflection of the beam. (Author)

Describes four synthesis experiments, adapted for the general chemistry laboratory, in which compounds in unusual oxidation are prepared. The abnormal oxidation states involved in the synthesis products are: silver (II), chromium (II), lead (IV), and bromine (I). (MLH)

Describes a classroom organized as a self-contained closed spaceship which provides an opportunity for individualized learning based on student interests and a chance to wrestle with the problems that would arise on an interstellar journey in a spaceship. (BR)

Describes the Alabama Space and Rocket Center in Huntsville, Alabama as stimulating experience for students in aerospace education. The center has the largest collection of space-age hardware assembled under one roof, a Space Flight simulator, a Skylab space station mock-up and many more interesting exhibits. (BR)

Describes two experiments, one involving the electrolysis of potassium iodide and the other involving a diffusion process in solid copper. (GS)