Crevasses Deep Fractures or Cracks

question 30

Multiple Choice

Crevasses deep fractures or cracks. form in glaciers because______ .

• A) as the glacier moves over irregular topography, the brittle upper layer or zone of fracture is subject to tension and cracks above the ductile layer
• B) as the glacier moves over irregular topography, cracks can form anywhere in the glacier but they are called "crevasses" only if they are near the surface
• C) not all of the ice in a glacier moves downhill at the same rate in the glacier
• D) as the glacier moves over irregular topography the bottom of the glacier known as the zone of fracture. cracks and the cracks propagate upward to the surface of the glacier
• E) there is not always the same amount of ice available in all areas so cracks form when the ice tries to move and fill in empty parts of the glacier

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Definitions:

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