Weathering and Erosion NDA Questions

NDA Physical Geography

Weathering and Erosion MCQ Questions


7.
What distinguishes weathering from erosion?
A.
Weathering involves transportation; erosion does not
B.
Erosion is confined to deserts; weathering occurs everywhere
C.
They are identical processes
D.
Weathering breaks down rocks in situ; erosion involves transportation of material
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ANSWER :
D. Weathering breaks down rocks in situ; erosion involves transportation of material
8.
The layer of weathered, unconsolidated material overlying bedrock is called:
A.
Lithosphere
B.
Regolith
C.
Mantle
D.
Pedosphere
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ANSWER :
B. Regolith
9.
Weathering is greatest in which climatic zone?
A.
Hot and humid tropical regions
B.
Cool temperate maritime regions
C.
Hot deserts with extreme aridity
D.
Polar tundra
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ANSWER :
A. Hot and humid tropical regions
10.
Which type of weathering involves NO chemical change in mineral composition?
A.
Oxidation
B.
Mechanical (physical) weathering
C.
Carbonation
D.
Hydrolysis
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ANSWER :
B. Mechanical (physical) weathering
11.
The process by which rocks expand and peel off in concentric shells due to temperature changes is called:
A.
Hydration
B.
Salt crystallisation
C.
Exfoliation (onion weathering)
D.
Frost action
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ANSWER :
C. Exfoliation (onion weathering)
12.
Frost action (freeze-thaw) is most effective when:
A.
Humidity is very low
B.
Temperature stays constantly below 0°C
C.
Temperature stays well above 0°C
D.
Temperature oscillates around 0°C allowing repeated freezing and thawing
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ANSWER :
D. Temperature oscillates around 0°C allowing repeated freezing and thawing