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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.

Hard · Level 2 · 25 questions

TOPIC PRACTICE

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  1. They mix soil and increase porosity
  2. They turn parent rock into lava
  3. They completely stop leaching
  4. They create sea waves
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  1. Because raindrops and runoff rapidly erode exposed soil
  2. Because weathering immediately stops after plants are removed
  3. Because humus suddenly becomes infinite
  4. Because slope disappears
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  1. Because climate organisms relief and time also control the process
  2. Because parent rock has no effect
  3. Because soil forms only in oceans
  4. Because organisms are always absent
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  1. Slow decomposition and acidic organic matter
  2. High evaporation and calcium accumulation
  3. Daily sand deposition by river
  4. Permanent salt crust formation
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  1. Reducing conditions and gley colour
  2. Intense wind erosion
  3. Water without any calcium movement
  4. Permanently dry surface
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  1. Availability of some nutrients may decrease and toxicity may increase
  2. The availability of all nutrients increases equally
  3. Water entry into the soil becomes impossible
  4. The parent rock melts immediately
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  1. Higher concentration of soil solution makes water absorption difficult
  2. Salts always make all roots longer
  3. Salts remove all water from soil
  4. Salts stop rainfall
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  1. On steep exposed slopes with heavy rainfall
  2. On flat land under stable forest cover
  3. In a closed lake with slow drainage
  4. On gentle slope with grass cover
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  1. Erosion can continuously remove weathered material
  2. Time has no effect
  3. All soils form to equal depth
  4. Parent rock always remains liquid
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  1. It improves crumb structure and fine pores
  2. It throws water out of soil
  3. It turns all particles into glass
  4. It always makes soil waterproof
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  1. Water participates in weathering leaching and material transfer
  2. Water only changes colour and performs no process
  3. Water always destroys soil organisms
  4. Water forms soil only in oceans
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  1. Reduced aeration and water infiltration
  2. All nutrients immediately doubling
  3. Soil becoming an ocean
  4. Vegetation growing without roots
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  1. Accumulation of materials from upper layers
  2. Only accumulation of fresh leaves
  3. Soil forming without parent rock
  4. Formation of clouds in the atmosphere
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  1. Where organic residues accumulate on the surface
  2. On bare rock without organisms
  3. Only under sea waves
  4. Inside a salt crust without organic matter
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  1. It may be a zone of partly weathered parent material
  2. It is always pure humus
  3. It is only plant leaves
  4. It is a gas layer of the atmosphere
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  1. Reduced runoff and soil erosion on slopes
  2. Immediate destruction of all nutrients
  3. Complete end of soil profile
  4. Parent rock flying away
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  1. Sodium can disperse particles and weaken crumb structure
  2. Sodium always increases humus
  3. Sodium turns all water into cloud
  4. Sodium turns parent rock into mountain
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  1. Because a river can bring sediments from distant sources
  2. Because a river makes rocks disappear without particles
  3. Because transported soil has no minerals
  4. Because river deposits never become soil
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  1. More initial mineral particles may be available for soil formation
  2. Soil formation always stops
  3. Rainfall completely stops
  4. Role of organisms becomes zero
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  1. Temperature moisture and availability of organic matter
  2. Only the name of mountain height
  3. Number of solar eclipses
  4. Change in colour of sea
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  1. Physical weathering can increase surface area and speed chemical weathering
  2. Both always stop each other
  3. Chemical weathering occurs only without water
  4. Physical weathering never helps soil formation
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  1. When waterlogging creates oxygen deficiency
  2. When both heat and oxygen are sufficient
  3. When bacteria are very active in soil
  4. When drainage is very good
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  1. Because temperature also changes decomposition and microbial activity
  2. Because temperature has no relation with soil
  3. Because temperature only changes river length
  4. Because temperature always removes salts
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  1. Studying parent material climate organisms relief time and human impact together
  2. Drawing conclusion only from rock colour
  3. Explaining all soil properties only by rainfall amount
  4. Deciding the whole soil from only one horizon
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  1. Parent rock immediately starts melting
  2. Decomposition of organic matter and soil mixing may slow down
  3. River deposition always stops
  4. All salts in soil disappear automatically

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