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Understanding the Role of Bacteria in Health and Disease

This lesson plan explores the essential role of bacteria in our health, focusing on their contributions to digestion and the diseases they can cause, such as streptococcus and diphtheria. Students will engage in hands-on activities, including constructing a bacterium model and conducting experiments using antibiotic discs to learn about the zone of inhibition. Additionally, we will discuss the importance of nitrogen-fixing bacteria in the nitrogen cycle and clarify common misconceptions about bacteria, emphasizing that not all bacteria are harmful and that many infections can be treated with antibiotics.

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Understanding the Role of Bacteria in Health and Disease

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  1. Daily TAKS Connection:Bacteria Objective 3 BIO (4):The student knows that cells are the basic structures of all living things and have specialized parts that perform specific functions, and that viruses are different from cells and have different properties and functions. The student is expected to: (D) Identify and describe the role of bacteria in maintaining health such as in digestion and in causing diseases such as in streptococcus infections and diphtheria

  2. Construct a Model of a Bacterium innoculated petri dish Materials: Template handout Scissors Pen Colored pencils/crayons Instructions: Hamburger along the dashed lines Foldable Instructions

  3. Label your template Bacterial Growth A B C Antibiotic Discs

  4. Draw a Zone of Inhibition for each antibiotic disc with a yellow colored pencil and color it in B A C Zone of Inhibition

  5. Answer Questions on your Foldable • Which Antibiotic (A,B, or C) is most effective against the E.Coli (Escherichia coli )bacteria (located in your digestive system to help process nutrients)? • Where in your body can a large amount of bacteria be found?

  6. Nitrogen Cycle Notes Nitrogen fixing bacteria transform unusable forms of nitrogen to usable forms for organisms. They are an important part of the nitrogen cycle Record in Your Notes

  7. Bacteria FAQs Record in Your Notes • Not all bacteria is harmful • Most bacterial infections can be controlled with antibiotics • 3. Heat often kills bacteria (fever, cooking food thoroughly)

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