The uppermost layer of a glacier is brittle,but beneath the ice behaves as a plastic substance and moves by slow flowage.

Name: The uppermost layer of a glacier is brittle,but beneath the ice behaves as a plastic substance and moves by slow flowage.
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Quizplus · Accepted Answer

This statement is true. The upper layer of a glacier is exposed to more stress and is therefore more brittle, while the deeper layers behave as a plastic substance and move slowly due to the weight of the ice above them.

The Uppermost Layer of a Glacier Is Brittle,but Beneath the Ice