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Transpiration

ICSE · Class 10 · Biology

Step-by-step guide to study Transpiration in ICSE Class 10 Biology. Topics to cover, practice strategy, and time allocation.

44 questions22 flashcards5 concepts

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A comparison chart highlighting the key differences between transpiration, evaporation, and perspiration in terms of process type, speed, cellular involvement, and primary function.
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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.

2
Day 3

Practice Problems

Solve textbook exercises and additional practice questions. There are 44 questions available for this chapter.

3
Day 4

Revise & Test

Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.

4
Day 7

Spaced Revision

Revisit Transpiration after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.

What to Focus On

  • Transpiration is the loss of water vapours from aerial parts of a plant.
  • Plants absorb huge quantities of water but retain only 1–2% for metabolic use.
  • Transpiration is a physiological (biological) process, unlike evaporation which is physical.

  • Bell jar method: Water droplets on the jar's inner wall prove plant loses water vapour.
  • Polythene bag method: Droplets inside the bag confirm water loss from a branch.
  • Cobalt chloride method: Blue paper turns pink due to moisture from transpiration.

  • Weighing method: Loss in weight of leafy shoot = water lost by transpiration.
  • Ganong's potometer measures the rate of water absorption as an indicator of transpiration rate.
  • The air bubble moves towards the shoot as water is absorbed due to transpiration.

Common Mistakes to Avoid

Transpiration is the same as evaporation — both are just water turning into vapour

Guard cells open stomata by becoming flaccid (losing water), and close them by becoming turgid (gaining water)

Stomata are found only on leaves and nowhere else on the plant

Memory Tips

Definition of Transpiration

Three Types of Transpiration — Stomatal, Cuticular, Lenticular

Stomatal Transpiration — Guard Cells open stomata during day

Cohesive and Adhesive Forces in Ascent of Sap

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Frequently Asked Questions

What are the important topics in Transpiration for ICSE Class 10 Biology?
Key topics in Transpiration include Stomatal Opening vs Closing — The Correct Mechanism, Transpiration - Complete Chapter Concept Map, Overview of Transpiration — All Key Concepts. These are the concepts ICSE Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Transpiration — ICSE Class 10 Biology?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Transpiration

All 16 chapters — ICSE Class 10 Biology Study Plan

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