An experimental system, suitable for secondary schools, uses Chlorella vulgaris to demonstrate the effects of mercury and cadmium. Very low concentrations of mercury or cadmium decrease growth, whereas lead or arsenic have little effect. Further experiments show additive interactions between mercury and cadmium and antagonistic interactions…

Explains a way to determine the age of a turtle, how to care for them and what to feed them while in temporary captivity. (GA)

Urges the use of the immediate environment of the school to serve as a focus and a medium to help plan activities and experiments in the different subject areas of science, and in the area of environment. (GA)

Describes several activities that can be done with laboratory mice to study the physiological role of oxytocin. Diagrams included. (MA)

Explains some of the ways in which dried yeast has been used in sixth-form work to illustrate some points and principles relevant to a high school biology course. (Author/GA)

Provides a reading list of articles and journals for high school biology on a wide range of topics. A few short articles and experiments on biology related topics are also given. (GA)

Describes the use of atomic spectra that are excited in inductively coupled plasmas for the simultaneous or sequential determination of the elements at all concentration levels. (HM)

This study was undertaken to develop an affective, small-group experience for helping children cope with death and to investigate the effectiveness of the experience in reducing children's anxieties about death. The generally positive results suggest that affective death education experiences such as this one should be made available to children.…

Three experiments assessed the effect of visual familiarity of words on "same-different" reaction times (RTs) in a simultaneous-matching task. All three studies showed visual familiarity to be responsible for differences in slope over sequence length between words and nonwords. (Editor/RK)

The relationship between the depth to which a word is initially processed and its eventual probability of being recognized was investigated with amnesiac (alcoholic Korsakoff) patients. (Editor)

After discussing the economic and social pressures which may impinge upon parental judgment in the experimental setting, the article reviews several divergent opinions on the ethics of child research. (Author)

A computer program which simulates an interstellar gas and dust cloud has been used to study Kirchhoff's laws of spectral analysis in introductory astronomy courses. The model parameters can be varied to stimulate various effects observed in actual clouds. Students are given exercises to use the program in a manner similar to a lab experiment.…

Describes the construction of a direct-reading inertial balance that works on the same principle as that used by astronauts in space when weightless. It is used to help demonstrate and measure inertial mass. (GA)

Describes the construction and use of a simple apparatus to measure the magnetization density and magnetic susceptibility of ferromagnetic, paramagnetic, and the diamagnetic solids and liquids. (Author/GA)

Principles, experimental procedures, results, and discussion of this method are included here. The method was used in undergraduate laboratory courses in Toulouse, France. (BB)