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Subjects

Geography

Mass movements, erosion, and deposition

In Class 11 Geography, this topic within “Geomorphic Processes” explains how weathering, gravity, running water, wind, glaciers, waves, and underground water reshape the land. Students learn to distinguish mass movements such as landslides and soil creep from erosion, examine how sediments are transported, and understand deposition that builds features such as fans, floodplains, dunes, moraines, and deltas. It connects processes, landforms, and environmental impacts through clear geographical examples.

Expert · Level 5 · 25 questions

TOPIC PRACTICE

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  1. Free fall dominates rockfall while mixed material flows in debris flow
  2. Rockfall always occurs in sea while debris flow occurs in glaciers
  3. Both are only chemical deposition
  4. Slope has no role in either
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  1. It moves material downward in backward-tilted blocks
  2. It lifts sand by wind
  3. It only raises the river bed
  4. It stops sea waves
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  1. Tilted trees and bent fences on a slope
  2. Coral islands in the sea
  3. Tides at river mouth
  4. Permanent glaciers in desert
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  1. The thawed upper soil flows over the frozen lower layer
  2. Because sea waves continuously erode there
  3. Because air is completely absent there
  4. Because all rocks are molten magma
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  1. It removes support from the slope base
  2. It permanently strengthens the mountain
  3. It completely stops rainfall
  4. It cements all sediments
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  1. Debris flow has more coarse particles while mudflow has more fine particles and water
  2. Debris flow is only gas while mudflow is only ice
  3. Neither contains water
  4. Both form only in river deltas
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  1. Mass movement brings material down and erosional agents may transport it further
  2. Mass movement always ends river deposition
  3. Erosion occurs only inside the Earth
  4. Both processes are unrelated to gravity
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  1. When fast flow increases air and water pressure in cracks
  2. When the river has no energy
  3. When the river completely freezes
  4. When the river only performs chemical solution
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  1. They act as tools and scrape the bed and banks
  2. They permanently stop the river
  3. They are deposited only in the atmosphere
  4. They always make water alkaline
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  1. Attrition by mutual collision
  2. Biological decomposition
  3. Complete extinction
  4. Lava flow
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  1. Solution or corrosion
  2. Only snowfall
  3. Only wind saltation
  4. Only tidal deposition
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  1. Deep V-shaped valley
  2. Flat delta plain
  3. Wide sand dune
  4. Coral reef
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  1. The valley widens and a floodplain may develop
  2. The valley only becomes deeper
  3. River water turns into vapor
  4. The river forms mountains instead of delta
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  1. When river carrying capacity and velocity decrease
  2. When river energy suddenly increases greatly
  3. When bed slope becomes very steep
  4. When the river dissolves all sediments
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  1. Where a mountain stream enters a plain
  2. Where a river ends in deep sea
  3. Where a glacier only stops melting
  4. Where wind remains completely still
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  1. Fine alluvial soil is repeatedly deposited during floods
  2. Floods always burn the soil completely
  3. Floodplain forms only from hard lava
  4. Floods bring no sediment
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  1. Erosion on outer bank and deposition on inner bank
  2. Only glaciation on both banks
  3. Deposition on outer bank and rockfall on inner bank
  4. Only solution on both banks
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  1. The old bend is cut off after a meander neck is breached
  2. A glacier directly makes a circular lake
  3. Waves reverse the river
  4. Wind freezes river water
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  1. Hydraulic action and abrasion at the base followed by collapse of overlying rock
  2. Only delta deposition
  3. Only loess deposition by wind
  4. Only marine coral growth
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  1. Surface runoff has turned small channels into deep erosion lines
  2. Sea waves have made coral
  3. Glacier has deposited all sediments
  4. No runoff occurred in the soil
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  1. Because a thin layer of soil is removed uniformly
  2. Because it only forms deep ravines
  3. Because it always occurs on the sea floor
  4. Because soil thickness increases in it
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  1. Removal of loose fine particles by wind lifting
  2. Dissolving limestone by wind
  3. Formation of river delta by wind
  4. Movement of glacier by wind
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  1. Persistent directional wind and rocks of unequal hardness
  2. Only river flood and delta deposition
  3. Only coral growth and calm sea
  4. Only frozen soil and solifluction
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  1. Saltation
  2. Suspension
  3. Solution
  4. Slump
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  1. Wind-deposited fine dust-like fertile silt
  2. River-deposited large boulders
  3. Sea-formed coral
  4. Glacier-dissolved gas

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