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This resource provides a problem-based activity on risk assessment of environmental health issues. The lesson consists of three related activities: Bacteria Study, Micro Study and Bacteria Killers. "Bacteria Study" gives students hands-on experience with the concepts of epidemiology. "Micro Study" has students sketch, observe, and compare different types of bacteria that can grow in moist conditions. "Bacteria Killers" has students determine what kills bateria, especially in common household products. Detailed instructions are provided for each activity. This resource is free to download. Users must first create a login with ATEEC's website to access the file.
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