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Introduction
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Activities
- Activity 1. Research and collect data on foods that contain beneficial bacteria
- Activity 2. Investigation of bacteria in food samples
- Activity 3. Investigation of factors that influence the number of beneficial bacteria
- Activity 4. Investigation of beneficial bacteria in soil and water
- Activity 5. Presentation of the products of independent work
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Quiz
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Conclusion
Activity 3. Investigation of factors that influence the number of beneficial bacteria
- Read carefully the information in Worksheet 3. Number of beneficial bacteria at different temperatures and times carefully.
- Investigate the effect of temperature and time using the data presented in the table on the worksheet. Work cooperatively in small groups.
- Discuss as a group and analyse the experimental data for the two products for which the number of beneficial bacteria in them was measured at different temperatures and times.
- Work together as a group to answer the following questions:
- How does the number of beneficial bacteria change with increasing temperature and time for each product?
- Which of the two products has more beneficial bacteria under the same conditions?
- Under what conditions (temperature and time ) is the difference in the number of beneficial bacteria between the two products greater?
Work collaboratively, giving everyone a chance to express their opinion in the group.
At the end of the lesson, each group shares the results of their data analysis.
Model for work:
Download Worksheet 3. HERE
