(i) Size or thickness of glacier: large masses of ice exert pressure which lead to melting of ice underneath. This increase the speed of ice movement.
(ii) Nature of the surface: when the surface on which ice is moving is rough, it causes friction lowering the speed of the movement of ice.
(iii) Gradient of the land: ice moves faster when the slope is steep.
(iv) Temperatures or seasonal changes: higher temperatures result into thawing,leading to faster movement of ice.
maurice.mutuku answered the question on June 8, 2017 at 11:22
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