Describes simple quantitative determinations for ethanol and carbon dioxide, together with techniques for examining the effects of a number of environmental factors on their production. The experimental work centers around the growth of a cell population of yeast, and is suitable for senior high school students. (JR)

Describes two experiments using carbon dioxide cartridges to demonstrate Newton's third law of motion. (JR)

A description of the film loop laboratory system as an attempt to increase the desirability, flexibility, and efficiency of physics experiments for non-science students. (Author)

Article discusses the best way to build a background of familiarity and an attitude of readiness for science learning. (Author/RK)

Discusses student use of the computer with mathematical models and with laboratory simulations. Examples given. (DS)

A study conducted by high school advanced bacteriology students appears to confirm the hypothesis that the incremental administration of antibiotics on several species of bacteria (Escherichia coli, Staphylococcus epidermis, Bacillus sublitus, Bacillus megaterium) will allow for the development of antibiotic-resistant strains. (PEB)

Discusses the nature and applications of mass-selective laser photoionization. The ionization can be done with a single intense laser pulse lasting a few billionths of a second with no molecular fragmentation. Applications focus on: (1) benzene clusters, excimers, and exciplexes; (2) metal clusters; and (3) triplet formation and decay. (Author/JN)

Free radical chlorination of methane is used in organic chemistry to introduce free radical/chain reactions. In spite of its common occurrence, demonstrations of the reaction are uncommon. Therefore, such a demonstration is provided, including background information, preparation of reactants/reaction vessel, introduction of reactants, irradiation,…

Describes an experiment on the qualitative analysis of several over-the-counter analgesic tablets. Background information, procedures used (including high pressure liquid chromatography), and typical student results are included. (JN)

Describes the nature of three types of science experiments, focusing on those designed to answer the questions: "What happens?"; "How can it be done?"; and "Which theory?". Indicates that all three have had a definite place in the school science curriculum. (JN)

The reaction between arsenite and iodate in acidic solution offers an excellent pedagogic introduction to such phenomena as traveling waves. Component reactions, traveling waves, and a mathematical model are discussed. Demonstrations described can easily be elaborated into a full laboratory experiment. (Author/JN)