1. What role does liquid water play in glacial plucking? a Liquid water can work

Question

1. What role does liquid water play in glacial plucking?

a Liquid water can work its way into crack in the bedrock over which the glacier is moving. When the liquid water freezes it can lift rock fragments into the glacier.

b. The liquid water acts as a lubricant for the glacier. Where the water is abundant the glacier moves very quickly. This creates a vacuum (low pressure) which pulls (plucks) rocks out of the glacier valley

.c. Liquid water at the base (and sides) of the glacier can initiate the cavitation process when under great pressure. Cavitation "plucks" rocks of the bottom (or sides) of the glacial valley.

d. All of these are plucking processes produced in glaciers.

Explanation / Answer

a

plucking is the process of removal of rock materials by glacier. every glacier melts at its base due to its pressure , this melting results in the formattion of water and this water enters the rock cracks and makes the rock more disintegrated by the process of freezing and thawing

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