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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.

Hard · Level 4 · 25 questions

Practice questions

01Why can weathering increase rapidly on rocks exposed by mining or road cutting?

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02What is the main difference between chemical weathering and erosion?

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03Which option most clearly represents physical weathering?

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04Which option is the most suitable example of chemical weathering?

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05Why can biological weathering be considered a mixed process?

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06Which weathering process is more important in the early development of karst topography?

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07Formation of an iron oxide layer on a rock surface indicates which process?

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08In a high rainfall area downward removal of soluble rock components is linked with which process?

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09Why does the effect of plant roots in a rock with fine cracks increase over time?

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10If minerals in a rock have high solubility which weathering is more likely?

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11In a desert that is very hot by day and cold by night which process can create stress in rocks?

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12Why does chemical weathering often become faster after physical weathering?

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13Under which condition is biological weathering most likely to be minimal?

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14How does mineral instability affect chemical weathering of rocks?

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15Small pit-like hollows on rock surfaces can form due to which combined effect?

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16How can organic matter in soil affect chemical weathering?

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17Breaking into loose particles without change in mineral composition identifies which weathering?

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18Why does chemical weathering usually affect the rock surface before the interior?

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19Which option is the best example of biological chemical weathering?

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20Which group is the most complete set of factors controlling weathering rate?

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21If a rock has a dense joint system and the area is humid what is the likely result?

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22Why can both oxidation and hydrolysis be active in a warm humid climate?

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23Granular disintegration of rock may be more visible in which rocks?

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24If weathered residues remain at the same place how should they be understood?

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25Why can chemical weathering reduce rock strength even without removing large pieces?

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