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Key Facts About Transpiration

Part of Transpiration · GCSE GCSE Biology revision

This key facts covers Key Facts About Transpiration within Transpiration for GCSE Biology. Transpiration process, stomatal control, factors affecting rate, plant adaptations, measuring transpiration, and practical investigations It is section 2 of 21 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 21

Practice

21 questions

Recall

25 flashcards

Key Facts About Transpiration

  • Water loss scale: 99% of water absorbed is lost through transpiration
  • Cooling effect: Can reduce leaf temperature by 10-15°C
  • Transport height: Creates negative pressure pulling water up to 120m in tall trees
  • Stomatal density: Leaves have 100-300 stomata per mm²
  • Daily rhythm: Most transpiration occurs during daylight hours
  • Desert adaptations: CAM plants lose 90% less water than normal plants

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.

The Hidden Power of Water LossThe Transpiration Stream — Tap to ExploreThe Transpiration ProcessStomata: The Control Valves

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).

21 questions on Transpiration — practise free

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The Hidden Power of Water Loss

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The Transpiration Stream — Tap to Explore