Understanding Water Activity

This Understanding Water Activity interactive also includes:

New Review

How does water activity play a role in food spoilage? First, the learners think about which types of foods would be best to take on a backpacking trip based on the water activity of different foods. It then walks through why water affects bacterial growth in food and ways to reduce the amount of water in food to increase its longevity. Finally, pupils use meters to test for water activity in food samples.

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CCSS: Adaptable
Instructional Ideas

  • Use to introduce the molecular structure of water and how it interacts with other compounds
  • Have scholars evaluate food storage in their own homes and identify ways to improve it
Classroom Considerations

  • Suggests completing the lab before the Controlling Water Activity virtual lab
Pros

  • Activity is explanatory and self-paced 
  • Includes audio for additional support
Cons

  • None
Common Core