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Subjects

Geography

Weathering: physical, chemical, and biological

In Class 11 Geography, this topic from the chapter “Geomorphic Processes” explains weathering as the breakdown and alteration of rocks at or near Earth’s surface without transporting the material. Students learn how physical weathering acts through temperature changes, pressure release, and frost; how chemical weathering involves processes such as solution, carbonation, oxidation, hydration, and hydrolysis; and how plants, animals, and microorganisms drive biological weathering. The topic also connects climate, rock type, relief, and time with soil formation and landscape development.

Medium · Level 2 · 25 questions

Practice questions

01How do burrowing organisms make rock or soil more prone to weathering?

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02What is one cause of thermal weathering in desert regions?

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03Why may chemical weathering be more effective than physical weathering in wet warm environments?

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04What may the layer of weathered debris formed above bedrock be called?

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05If rainfall is low what is the general effect on chemical weathering?

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06How does permeability of rock affect weathering?

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07Which option contains only chemical weathering processes?

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08Which option contains only physical weathering processes?

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09In which situation will biological weathering be most clearly visible?

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10Why is weathering called a geomorphic process?

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11Why is it difficult for weathered material to remain on steep slopes?

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12How is major landform change possible over long time despite slow weathering?

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13Why do colour texture and mineral composition of rock affect weathering?

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14How can physical weathering indirectly speed up chemical weathering?

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15What can the combined effect of roots and chemical reactions do in warm humid forests?

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16Which example shows the role of both chemical and biological weathering?

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17How does erosion benefit when weathered material is available?

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18Which factor most strongly controls the type of weathering in an area?

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19If water repeatedly freezes and thaws in rock cracks which process occurs?

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20How can soil and vegetation over rocks increase chemical weathering?

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21Why may weathering be relatively slow in hard rock with few cracks?

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22What is the purpose of classifying weathering into physical chemical and biological types?

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23What happens to rock composition during physical weathering?

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24Large difference between day and night temperature can increase which type of weathering?

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25Water freezing and expanding in cracks is an example of which process?

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