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Peer reviewedRayner-Canham, Geoff – Journal of College Science Teaching, 1993
Presents historical background and modern explanations for the popular demonstration of showing conductivity of solutions through the insertion of a light-bulb conductivity tester into deionized water and water with salt in it. (PR)
Descriptors: Chemistry, College Science, Demonstrations (Educational), Electricity
Peer reviewedHorvath, Thomas – Journal of College Science Teaching, 2005
In 1986, Lake Nyos, a volcanic lake in Cameroon, released a huge amount of carbon dioxide gas, killing over 1,700 people in the surrounding area. This case study, developed for use in a limnology or aquatic biology course, explores that event, introducing students to concepts relating to lake formation, thermal stratification, and dissolved gases.…
Descriptors: Foreign Countries, Biology, Chemistry, Earth Science
