Transpiration

• What is transpiration

  The process in which plants lose water
• What is transpiration caused by

  The evaporation and diffusion of water from the plants surface, primarily the leaves
• Where does the most transpiration occur

  The stomata
• Transpiration diagram

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• Measuring the rate of transpiration

  Use a potometer to measure water uptake.

  Fill the potometer with water, ensuring no air bubbles are in the tube when inserting the plant.

  Mark the STARTING POSITION of an air bubble in the capillary tube.

  Begin the experiment by starting a stopwatch to measure time.

  Note the DISTANCE MOVED by the air bubble over a set period, such as an hour, to calculate the rate of water uptake.