Got Dirty Air?

Abstract:: This lesson introduces students to the concepts of air pollution and technologies that have been developed by engineers to reduce air pollution. Students develop an understanding of visible air pollutants with an incomplete combustion demonstration, a "smog in a jar" demonstration, construction of simple particulate matter collectors and by exploring engineering roles related to air pollution. Next, students develop awareness and understanding of the daily air quality and trends in air quality using the Air Quality Index (AQI) listed in the newspaper. Finally, students build and observe a variety of simple models in order to develop an understanding of how engineers use these technologies to clean up and prevent air pollution.

Read the Fine Print

Honeybee Venom Detected by Enzyme Immunoassay

Abstract:: The venom of the honeybee, Apis mellifera, contains numerous enzymes, volatiles, and other components. Allergic individuals develop anti-venom antibodies which may cause hives, anaphylactic shock, and death. In this exercise students detect concentrations of bee venom on nitrocellulose membranes following incubation of membranes with anti-venom antibodies, enzyme-conjugated secondary antibodies, and a colorimetric substrate. The intensity of the colored substrate deposited on the membrane is proportional to the original concentrations of bee venom spotted on the membrane. Students are introduced to micropipetting and to the concept of detection limits while learning about allergy and immunoassays.

Read the Fine Print

Abstract:: Students are introduced to the concepts of air pollution and air quality. The three lesson parts focus on the prerequisites for understanding air pollution. First, students use M&Ms to create a pie graph that expresses their understanding of the composition of air. Next, students watch and conduct several simple experiments to develop an understanding of the properties of air (it has mass, it takes up space, it can move, it exerts pressure, it can do work). Finally, students develop awareness and understanding of the daily air quality using the Air Quality Index (AQI) listed in the newspaper. In an associated literacy activity, students explore the environmental history timeline.