Lesson Plan: Transpiration Biology

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to describe the process of transpiration and the effect of limiting factors on the rate of transpiration.


Students will be able to

  • describe the process of transpiration,
  • explain the effect of temperature, humidity, wind, and light intensity on the rate of transpiration,
  • describe the role of different plant structures in transpiration, including the xylem, stomata, and guard cells,
  • outline how a potometer can be used to investigate the rate of transpiration and use this to calculate transpiration rates.


Students should already be familiar with

  • the fact that plants require water to survive,
  • the basic structure of a plant, including the roots, stem, and leaves.


Students will not cover

  • the cohesion–tension/cohesion–adhesion theory,
  • the movement of water in symplast or apoplast pathways.

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