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Syllabus

Weathering and Denudation — Syllabus

ICSE · Class 9 · Geography

What Weathering and Denudation covers in ICSE Class 9 Geography: 4 topics, for the 2026-27 session. Part of the ICSE Class 9 Geography syllabus.

53 questions34 flashcards5 concepts

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A flowchart illustrating the three main types of weathering: Physical, Chemical, and Biological, with examples for each.
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4 Topics · ICSE Class 9 Geography · 2026-27

Topics in Weathering and Denudation

1

Meaning of Weathering

  • Weathering means the breaking up and decomposition of rocks at or near the Earth's surface.
  • Weathering is a static process because the rocks break where they are found.
  • Weathering leads to soil formation.
2

Types of Weathering

  • Weathering is of three types: physical or mechanical weathering, chemical weathering, and biological weathering.
  • Physical weathering breaks rocks into smaller pieces without changing composition.
  • Chemical weathering changes the composition of rocks through chemical action.
3

Physical Weathering

  • Physical weathering does not change the composition of rocks.
  • It is more effective in dry regions.
  • It is caused by extremes of temperature, nature of rocks, structure of rocks, frost, wind, and slope of land.
4

Chemical Weathering

  • The decomposition of rocks is called chemical weathering.
  • It is more common in hot and humid regions.
  • Chemical weathering is slower than mechanical weathering.

Key Concepts

Central concept: Weathering and denudation as external processes that change the Earth's surface and create landforms

WeatheringDenudationPhysical weatheringChemical weatheringBiological weatheringRiver workRiver stagesUpper course landforms

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Frequently Asked Questions

What are the important topics in Weathering and Denudation for ICSE Class 9 Geography?
Key topics in Weathering and Denudation include Meaning of Weathering, Types of Weathering, Physical Weathering, Chemical Weathering. Study these first, then practise questions on each for Class 9 exams.
How should I revise Weathering and Denudation for Class 9 exams?
Learn the core ideas first, then work through the 53 practice questions on Weathering and Denudation. 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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