Discusses phenomena relating to the nature of soap films and describes soap film experiments suitable for secondary school science students. (JR)

Discusses an experiment which introduces students to the effects of electrical forces on the motion of macroscopic objects. Included are the proecedures of measuring the charge-to-mass ratio from deflections of charged water drops in horizontal fields and the overall charges delivered in a Faraday cup. (CC)

Describes an activity using simple materials that gives students an opportunity to express their ideas about possible extraterrestrial life forms. (JR)

Describes how student understanding and interest in the metric system system can be stimulated by building and launching model rockets. (JR)

Describes several experiments, suitable for secondary school biology classes, using the bioluminescent marine bacterium, Achromobacter fischeri. (JR)

Describes the characteristics of Colpoda, a ciliated protozoan which is able to survive in a dry, encysted state for long periods of time. Outlines the procedures for culturing the organism and producing cyst preparations, and recommends its use in the high school biology laboratory. (JR)

Discusses the importance of ethene (ethylene) in industry and the pipeline grid in western Europe for transporting ethene. Describes methods for investigating organic compounds in school laboratories using ethene as the key compound. (JR)

Discusses holography, a process by which a three-dimensional image of an object can be completely recorded on a photographic film or plate. Introduces hologram theory with a view to presenting it to senior high school students, and explains how the apparently very great experimental difficulties can be overcome. (JR)