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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 4 · 25 questions

TOPIC PRACTICE

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25 questions

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  1. Oxidation
  2. Carbonation
  3. Exfoliation weathering
  4. Solution weathering
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  1. Completely dry waterless condition
  2. Only frozen ice
  3. Only sea wave
  4. Water with dissolved carbon dioxide
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  1. Chemical weathering
  2. Frost action only
  3. Salt weathering only
  4. No weathering
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  1. Chemical weathering only
  2. Biological weathering
  3. Marine weathering
  4. Atmospheric transport
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  1. It is only transport of rock
  2. It occurs only by sea waves
  3. It can be both physical breakdown and chemical alteration
  4. It is only a human-made process
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  1. They stop the sun
  2. They instantly melt rock
  3. They only lift stone
  4. They can release organic acids and weaken minerals
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  1. Temperature and moisture change the intensity of weathering processes
  2. Climate has no effect
  3. Climate only changes rock colour
  4. Climate only decides river route
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  1. All parts break at the same rate
  2. Weaker parts weather faster and harder parts remain relatively resistant
  3. Hard parts always dissolve first
  4. No part is affected by weather
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  1. Limestone dissolving in rainwater
  2. Iron forming rust
  3. Tree root growing in a crack and breaking rock
  4. Water only becoming vapour
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  1. Tropical rainforest
  2. Humid coastal area
  3. Warm river valley
  4. Extremely cold and dry area
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  1. To chemical weathering
  2. To solar eclipse
  3. To ending earthquakes
  4. To making atmosphere
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  1. Heating of rock during daytime
  2. Growth of plant root in a rock crack
  3. Transport of sand by wind
  4. Flow of particles by river
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  1. Because it takes energy from Earth's interior
  2. Because it occurs only from volcanoes
  3. Because it occurs only from earthquakes
  4. Because it occurs on Earth's surface by external agents
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  1. More cracks and more moisture
  2. Completely sealed surface
  3. Absence of water and air
  4. Uniform minerals and no cracks
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  1. When pieces remain large and sealed
  2. When pieces become small and come in contact with water
  3. When rock never meets air
  4. When all cracks are filled with cement
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  1. Frost action only
  2. Thermal expansion only
  3. Biochemical weathering
  4. Wind transport only
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  1. Only high temperature is needed
  2. Only dry air is needed
  3. Rock cracks and freezing thawing of water should occur
  4. Only carbon dioxide is needed
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  1. Because it mainly involves mechanical breakup
  2. Because it always forms new soil
  3. Because all minerals dissolve in it
  4. Because only bacteria work in it
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  1. Because it weakens rock and makes it breakable
  2. Because it immediately creates all mountains
  3. Because it occurs only in oceans
  4. Because it always stops transport
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  1. They can enlarge cracks and weaken rock
  2. They instantly turn rock into new soil
  3. They carry rock to the sea
  4. They remove all minerals from rock
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  1. Low moisture and high temperature range condition
  2. Very humid and continuously hot condition
  3. Soil rich in organic acids condition
  4. Acidic water on limestone condition
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  1. Soil formation
  2. Solar eclipse
  3. Origin of earthquake waves
  4. Ocean tides
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  1. Exfoliation weathering
  2. Carbonation
  3. Oxidation
  4. Hydrolysis
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  1. It can increase chemical reactions and weaken minerals
  2. It stops all weathering
  3. It only cools the rock
  4. It ends root growth
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  1. Slow weathering and continuous erosion
  2. Adequate moisture, warmth and long-term weathering
  3. Only permanent ice and dryness
  4. Rock remaining completely sealed

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