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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.

Expert · Level 4 · 25 questions

Practice questions

01Chelation is associated with which type of weathering?

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02In which condition is the weathering mantle likely to be thicker?

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03What is the usual effect of physical weathering on a rock’s chemical composition?

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04What is the main meaning of leaching in chemical weathering?

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05Why can salt weathering be strong in coastal rocks?

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06How is the effect of slope on weathering rate best understood?

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07What can be the role of earthworms and microorganisms in biological weathering?

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08In which process can a mineral absorb water, expand, and create stress in rock?

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09Why does greater surface area and smaller particle size increase chemical weathering?

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10What is the geomorphic significance of hydrolysis in silicate minerals?

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11Why is chemical weathering relatively slow in desert regions?

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12Which example shows physical and biological weathering acting together?

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13Why is weathering considered a foundation of landform development?

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14Under which condition is block disintegration most likely?

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15How do organic acids affect chemical weathering?

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16In which type of rock setting may thermal weathering be more prominent than solution weathering?

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17What effect can rainfall have on the depth of weathering?

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18Which statement correctly describes the preparatory role of weathering?

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19In which process can rock minerals be removed as dissolved ions in water?

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20Which factor can make two rocks weather at different rates even in the same climate?

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21Where can deep chemical weathering profiles generally develop more strongly?

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22Which example indicates formation of new minerals by chemical weathering?

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23Why is time an important factor for weathering?

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24Which option gives the correct sequential example of physical, chemical, and biological weathering?

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25If feldspar minerals in granite remain in contact with acidic rainwater for a long time which process and product are most appropriate?

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