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Practical skills assessed in a written examination

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Question 17

In an investigation into the rate of transpiration of a plant shoot, a student uses a potometer to monitor the movement of an air bubble along a graduated capillary tube.

  • The initial position of the bubble is recorded as 16.3 mm16.3\text{ mm}16.3 mm.
  • The final position of the bubble is recorded as 56.3 mm56.3\text{ mm}56.3 mm.
  • The scale on the capillary tube has an uncertainty of ±0.3 mm\pm0.3\text{ mm}±0.3 mm for each individual reading.

Calculate the percentage uncertainty in the measured displacement of the air bubble. Give your answer to an appropriate number of significant figures.

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Practical skills assessed in a written examination Questions

  1. A Level
  2. /Biology
  3. /Practical skills assessed in a written examination