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Subjects

Geography

Soil formation processes

In this Class 11 Geography topic from Geomorphic Processes, students learn how soil develops through the weathering of rocks and the gradual interaction of parent material, climate, organisms, relief and time. The topic explains key processes such as the addition and loss of materials, transformation of minerals and the movement of clay and other substances within the soil profile. It also helps students understand soil horizons, profile development and the influence of erosion and drainage on soil formation.

Expert · Level 3 · 25 questions

TOPIC PRACTICE

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  1. Basic chemical fertility of soil
  2. Height of daily tides
  3. Direction of atmospheric pressure
  4. Number of river bends
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  1. Because soluble nutrients move downward
  2. Because glaciers deposit new soil every year
  3. Because wind always deposits salt
  4. Because volcanic ash disappears
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  1. Relative accumulation of humus
  2. Immediate expansion of desert
  3. Complete absence of salts in soil
  4. Melting of rocks
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  1. Due to a mixture of humus and mineral particles
  2. Due only to fresh lava
  3. Due to permanent effect of sea waves
  4. Because photosynthesis occurs in soil
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  1. Because it allows other factors to operate
  2. Because time itself cuts soil
  3. Because time stops rainfall
  4. Because time creates parent rock
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  1. Climate changes rates of weathering and biological activity
  2. Parent rock changes colour everywhere
  3. All soils form in the same time
  4. Slope has no effect
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  1. Because material is removed downslope rapidly
  2. Because sunlight never reaches it
  3. Because rainfall always freezes
  4. Because plants can never form roots
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  1. Because deposits and moisture remain longer
  2. Because earthquakes never occur there
  3. Because only sand forms there
  4. Because organic matter is absent there
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  1. They add organic matter and improve soil structure
  2. They only turn soil into rock
  3. They completely stop rainfall
  4. They keep parent material unaffected
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  1. Removal of fine particles and soluble materials from upper horizons
  2. Deposition of material in lower horizons
  3. Conversion of rock into lava
  4. Permanent end of moisture in soil
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  1. Climate with high temperature and high rainfall
  2. Cold dry desert climate
  3. Permanently frozen glacial surface
  4. Plain with low rainfall and low temperature
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  1. Because low leaching and high evaporation accumulate calcium carbonate
  2. Because snow melts daily
  3. Because the river bed cuts very deep
  4. Because plants completely remove soil
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  1. Intense acidic leaching
  2. Filling of lava in soil
  3. Surface accumulation of calcium carbonate
  4. Complete washing of sea salt
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  1. Humification and soil mixing
  2. Marine erosion
  3. Tidal deposition
  4. Avalanche
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  1. Waterlogging and anaerobic decomposition
  2. Always very rapid desertification
  3. Immediate complete absence of nutrients
  4. Definite formation of a river source
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  1. Organic matter and iron oxidation condition
  2. Only river length
  3. Exact date of earthquake
  4. Height of sea waves
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  1. It increases water retention but may slow drainage
  2. It does not retain water at all
  3. It immediately turns soil into rock
  4. It ends rainfall
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  1. Because water passes quickly between large particles
  2. Because sand never has pores
  3. Because sand creates all salts
  4. Because rainfall does not occur in sand
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  1. It affects movement of air, water, and roots
  2. It decides length of day
  3. It increases mountain height
  4. It always changes river direction
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  1. Dissolution and leaching of some minerals
  2. Equal growth of all plants
  3. Immediate formation of limestone
  4. Conversion of seawater into soil
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  1. Because grass roots continuously add organic matter
  2. Because grasses completely stop rainfall
  3. Because no organisms live there
  4. Because volcanoes erupt every day
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  1. Because the surface becomes exposed to erosion
  2. Because parent material immediately increases
  3. Because humus suddenly doubles
  4. Because rainfall completely stops
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  1. Decomposition of organic remains and nutrient recycling
  2. Changing mountains into seas
  3. Turning rainfall into salt
  4. Making rocks fertile without weathering
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  1. They mix soil and improve aeration
  2. They completely burn soil
  3. They create sea waves in soil
  4. They destroy all minerals
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  1. When distinct horizons are clearly developed
  2. When only parent rock is visible
  3. When only river water is on the surface
  4. When no organic matter is present

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