Water Potential

Water flow isn't solely based on gravity. Pupils explore the formula for the potential of water through a measurement of psi based on the solute potential and the pressure potential. The lesson analyzes the example of placing salt on a slug and explains how the solute potential is calculated.

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CCSS: Adaptable
Instructional Ideas

  • Have a cheat sheet on which learners can take notes
  • Pause video throughout to allow learners to discuss and process the formula and concepts
Classroom Considerations

  • Lesson requires a computer, Internet access, and a projection system
  • May want to show the osmosis video first, since osmosis is mentioned throughout 
  • Part 36 in a series of 37
Pros

  • Includes a review sheet
  • Walks learners through the formula, and a sample calculation of solute potential occurs near the end
  • References the AP exam and gives examples of questions that may occur on the test
Cons

  • Includes the formula for the solute potential, which may be overwhelming for some learners
Common Core