Weathering and Denudation — Chapter Summary
ICSE · Class 9 · Geography
Summary of Weathering and Denudation for ICSE Class 9 Geography. Part of the ICSE Class 9 Geography syllabus. Weathering is the disintegration.
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Overview
Weathering is the disintegration and decomposition of rocks where they exist, so it is a static process. Denudation is the long-term wearing away of the Earth's surface, so it is a dynamic process. Weathering helps in soil formation and can also create new landforms, while denudation works through w
Key Concepts
Weathering is the breaking down
Weathering is the breaking down of rocks where they exist. It does not involve movement of material, so it is a static process. It leads to soil forma
Physical weathering breaks rocks into smaller
Physical weathering breaks rocks into smaller pieces without changing their composition. It is caused by heat, frost, wind, plants, humans and animals
Chemical weathering is the decomposition
Chemical weathering is the decomposition of rocks by chemical action. It is more common in hot and humid regions and is slower than mechanical weather
Biological weathering is caused by plants
Biological weathering is caused by plants, burrowing animals and human activities. Plant roots enter cracks and widen them, and roots may also produce
Denudation means laying base
Denudation means laying base. It is the long-term sum of processes that wear away the Earth's surface and reduce relief and elevation. It is both dest
Learning Objectives
- Understand the meaning of weathering and denudation
- Identify the three types of weathering: physical, chemical and biological
- Explain how rivers and wind act as agents of denudation
- Describe landforms made by rivers in different stages
- Describe landforms made by wind erosion and deposition
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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