ESS
Grade-4
Easy

Question

________is the process of glacial erosion.

  1. Abrasion and plucking
  2. Abrasion and mass movement
  3. Plucking and weathering
  4. Plucking and mass movement

hintHint:

The literal meaning of one word is to take something/someone from a place.

The correct answer is: Abrasion and plucking


    The correct option is a) Abrasion and plucking.
    There are two main processes of glacial erosion:
    1.Plucking:
    • The first is plucking, defined as the erosion and transport of large rocks. When a glacier crosses land, water beneath the glacier melts and seeps into cracks in the underlying bedrock.
    • This water freezes and melts, weakening the bonds that hold rock fragments together.
    • The resulting rock can be stripped from its rocky base and easily transported along a moving glacier. Plucking removes rocks and changes the landscape.
    2.Abrasion
    • Abrasion is defined as the erosion that occurs when particles rub against each other.
    • The gigantic volume of a glacier, along with the rock it pulls up and the sediment that attaches to its belly, usually tends to scratch and scrape the rock surface below.

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