Document: Heavy Metals Aquatic Envirnments Project Abstract: You might know that lead can be toxic, and that you can get lead poisoning from eating or inhaling old paint dust. Lead is called a heavy metal, and there are other sources of heavy metals that can be toxic, too. Silver, copper, mercury, nickel, cadmium, arsenic, and chromium are all heavy metals...

Document: Carbon Dioxide Sinks and Sources Abstract: Students will use a chemical indicator (BTB) to detect the presence of carbon dioxide.

Document: http://sciencecases.lib.buffalo.edu/cs/collection/detail.asp?case_id=421&id=421 Abstract: In this dilemma case study, the executives of a popular restaurant chain must decide whether to use irradiated meat, in this case, beef, to protect its customers from the bacteria, E. coli. Students learn about food irradiation and discuss issues related to food safety and the public’s acceptance of new food technologies. As developed, the case could be...

Document: http://sciencecases.lib.buffalo.edu/cs/collection/detail.asp?case_id=283&id=283 Abstract:This directed case study involves two “stories,” each one concerned with some aspect of osmosis in living cells. Part I is centered around the effects of a hypertonic environment on plant cells, while Part II focuses on the effects of a hypotonic environment on human cells. After reading the parts, students working in small groups evaluate the information...