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Learning objective

Examine and explain how changes in temperature and wind speed influence the rate of transpiration.

Read the explanation, check the common trap, then practise with flashcards and questions.

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  • Read the explanation.
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  • Practise with linked questions.
Cambridge IGCSE Combined ScienceTransport in plantsSupplement contentPractical objective

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Quick explanation

Examine and explain how changes in temperature and wind speed influence the rate of transpiration

  • This point belongs to Transpiration, especially Transpiration outcomes.
  • You need to be able to examine and explain how changes in temperature and wind speed influence the rate of transpiration.
  • The key ideas to know are Discuss, Evaluate, and Determine.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DiscussEvaluateDetermineDescribe

Why it matters

This objective helps connect Transpiration outcomes to exam-style questions, flashcards, and revision notes for Transpiration.

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Paper 6 structured question: Transpiration

Paper 6Alternative to PracticalPractical1 marks

Method

Method for Measuring Transpiration

1. Set up a potometer with a plant shoot. 2. Place the potometer in a controlled environment chamber. 3. Adjust the temperature of the chamber. 4. Measure the distance the water level in the potometer falls over a set time period at different temperatures.

Temperature (°C)Water Loss (cm)
202
254
306
358
  1. a

    State the independent variable in this experiment.

    Aim for approximately 1 distinct marking point.

    [1]
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Cambridge IGCSECombined Science resources