Weathering and Denudation
ICSE · Class 9 · Geography
Flashcards for Weathering and Denudation — ICSE Class 9 Geography. Quick Q&A cards covering key concepts, definitions, and formulas.
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Get startedWhat is weathering, and why is it called a static process?
Answer
Weathering is the disintegration and decomposition of rocks where they exist. It is a static process because the rocks break down in the same place without being moved away. Weathering is important be…
What is denudation?
Answer
Denudation is the long-term wearing away of the Earth's surface. It reduces elevation and relief of landforms and is a dynamic process because it involves movement of material. Its four phases are wea…
How are weathering and denudation different?
Answer
Weathering breaks rocks where they exist and does not involve movement, so it is static. Denudation is dynamic and includes weathering, erosion, transportation, and deposition. Weathering is only one …
What are the three main types of weathering?
Answer
The three main types are physical or mechanical weathering, chemical weathering, and biological weathering. Physical weathering breaks rocks without changing their composition, chemical weathering cha…
Why is physical weathering different from chemical weathering?
Answer
Physical weathering breaks rocks into smaller pieces but does not change the composition of the rock. Chemical weathering changes the composition of the rock minerals by chemical action. Physical weat…
What is exfoliation?
Answer
Exfoliation is a type of physical weathering caused by changes in temperature. Rock surfaces expand and contract, so the outer layers peel off. This can round off rectangular rock blocks by splitting …
How does frost cause weathering?
Answer
Water enters cracks in rocks and freezes. When it freezes, it expands and widens the cracks. Repeated freezing and thawing break the rocks apart. Frost is most common as a weathering agent in temperat…
What is block disintegration?
Answer
Block disintegration is physical weathering in which rocks split along joints into large rectangular blocks because of temperature change. It is common in well-jointed rocks such as granite, including…
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