The Food Chain

How does the amount of water required to grow alfalfa impact ice cream prices? The PBS food science video, part of a larger playlist, explains how farmers use water to grow the alfalfa that is fed to dairy cows. the video introduces the concept of hidden resources in basic foods.

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CCSS: Adaptable
NGSS: Designed
Instructional Ideas

  • Track one meat (chicken, beef, etc.) back to the resources needed to produce it and discuss the hidden resources
  • Before watching the video, bring in alfalfa and ask if this plant is something pupils eat
Classroom Considerations

  • Video allows for streaming, downloading, sharing, and even modifying as needed

  • Provides discussion questions
  • Requires very little class time

  • None