PrepWisePrepWiseTranspiration
OrganisationExam Tips

Exam Success Tips

Part of Transpiration — GCSE Biology

This exam tips covers Exam Success Tips within Transpiration for GCSE Biology. Transpiration process, stomatal control, factors affecting rate, plant adaptations, measuring transpiration, and practical investigations It is section 10 of 20 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.

Topic position

Section 10 of 20

Practice

20 questions

Recall

25 flashcards

Exam Success Tips

  • Remember THAW: Temperature, Humidity, Air movement, Water/light - factors affecting transpiration
  • Potometer limitation: Always state it measures uptake, not transpiration directly
  • Guard cell mechanism: K⁺ ions → osmosis → turgor → shape change
  • Adaptations: Link structure to function (e.g., sunken stomata trap humid air)
  • Graphs: Be ready to interpret transpiration rate vs time or environmental factors
  • Calculations: Rate = distance/time, remember units (mm/min or ml/hour)
  • Practical skills: Explain why cutting underwater prevents air bubbles
  • Integration: Link to xylem structure (Topic 14) and gas exchange (Topic 13)

Keep building this topic

Read this section alongside the surrounding pages in Transpiration. That gives you the full topic sequence instead of a single isolated revision point.

Required Practical: Investigating Factors Affecting TranspirationHigher CAM Photosynthesis: The Ultimate Water-Saving StrategyThe Hidden Power of Water LossKey Facts About Transpiration

Practice Questions for Transpiration

What is transpiration?

  • A. The evaporation of water from plant leaves through stomata
  • B. The movement of sugars through phloem
  • C. The absorption of water by root hair cells
  • D. The process of photosynthesis in leaves
1 markfoundation

Describe the three stages of transpiration in a leaf.

3 marksstandard

Quick Recall Flashcards

What is a xerophyte?
A plant adapted to survive in dry/arid conditions with limited water availability (e.g., cacti, marram grass).
What is a potometer?
An apparatus that measures the rate of water uptake by a plant shoot. Used to estimate transpiration rate (though actually measures uptake, not loss).

Want to test your knowledge?

PrepWise has 20 exam-style questions and 25 flashcards for Transpiration — with adaptive difficulty and instant feedback.

Join Alpha

Previous

Required Practical: Investigating Factors Affecting Transpiration

Next

Higher CAM Photosynthesis: The Ultimate Water-Saving Strategy