1.The presence of a crevasse indicates: the glacier is retreating brittle deform
ID: 119103 • Letter: 1
Question
1.The presence of a crevasse indicates:
the glacier is retreating
brittle deformation at the surface of a glacier
plastic deformation of the glaical ice
basal slip
sublimation
2.The flow of glacial ice under generally solid conditions via the breaking and reforming of chemical bonds:
brittle flowing
basal sliding
plastic deformation
compaction
calving
3.The boundary between the zone of ablation and zone of accumulation is called:
the terminus
a meltwater pool
the equilibrium line
the basal crevasse
the brittle/pastic transition
the glacier is retreating
brittle deformation at the surface of a glacier
plastic deformation of the glaical ice
basal slip
sublimation
Explanation / Answer
1) brittle deformation at the surface of a glacier
Note : The surface of a glacier is brittle and due to brittle deformation deep cracks are formed which are called as crevasses .So the presence of a crevasse indicates brittle deformation at the surface of a glacier.
3) the equilibrium line
Note: The boundary between the zone of ablation and the zone of accumulation is called as the equilibrium line where the accumulation of snow = ablation of water.
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