ESS
Grade-4
Easy
Question
U-shaped valleys and parallel grooves in bedrock are formed by________.
- Erosion by wind
- Erosion by ice
- Erosion by waves
- Erosion by water
Hint:
U shaped valleys and parallel groove in bedrock are characteristics of erosion by glacial ice.
The correct answer is: Erosion by ice
- U shaped valleys are formed by glaciation.
- Glaciation develops in v shaped river valleys where ice erodes the surrounding rocks to form u shaped valleys.
- Glacial grooves are caused by glaciers moving over the bedrock.
- Rock material is embedded into the bedrock as they move . This cuts the bedrock .
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