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Revision Notes

Water as a Resource — Revision Notes

ICSE · Class 3 · Science

Water as a Resource revision notes for ICSE Class 3 Science: 4 topics in quick points. Part of the ICSE Class 3 Science syllabus.

52 questions30 flashcards5 concepts

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Key Topics to Revise

1

1. Change of State of Water

  • Water can change from one form to another: solid (ice), liquid (water), and gas (water vapour).
  • Evaporation happens when water turns into vapour due to heat from the Sun.
  • Condensation happens when water vapour turns back into water due to cooling.
2

2. The Water Cycle

  • The water cycle is the continuous movement of water between the Earth and the atmosphere.
  • Steps: Evaporation → Condensation → Cloud formation → Rain or snow → Collection in rivers, lakes, oceans.
  • The Sun is the main driver of the water cycle.
3

3. Impurities in Water

  • Water from rivers, lakes, and ponds has impurities and is not safe to drink directly.
  • Impurities can be soluble (dissolve in water) or insoluble (do not dissolve).
  • Soluble impurities include salts of sodium, calcium, magnesium, and iron.
4

4. Purification of Water

  • Water must be purified before drinking to remove dirt and kill germs.
  • Common methods: Boiling, Chlorination, and Water Purifiers.
  • Boiling kills germs by heating water for 5–10 minutes.

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Full Notes

Key Concepts

When water is heated byWhen water vapour in the airThe water cycle is the continuousWater from riversCleaning dirty water to make it

Frequently Asked Questions

What are the important topics in Water as a Resource for ICSE Class 3 Science?
Key topics in Water as a Resource include Change of State of Water, The Water Cycle, Impurities in Water, Purification of Water. Study these first, then practise questions on each for Class 3 exams.
How should I revise Water as a Resource for Class 3 exams?
Learn the core ideas first, then work through the 52 practice questions on Water as a Resource. Revise 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.

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