glacial landforms and types of erosion

Question 1

ribbon lakes

Answer 1

long, narrow lakes often tens of meters deep. most ribbon lakes are a result of sever erosion of the glacial trough

Question 2

hanging valleys

Answer 2

they are small tributary valleys above the main glacier trough. When smaller glaciers in these valleys were unable to erode down to the same level as the main glaciers.

Question 3

glacial trough

Answer 3

a steep sided, wide and flat bottomed valley, formed by abrasion

Question 4

truncated spurs

Answer 4

when a glacier is unable to flow round an already existing interlocking spurs, the glacier cuts straight through it forming a steep sided truncated spur

Question 5

abrasion

Answer 5

it is the sand paper effect caused by the weight of the ice scoring the valley floor.

Question 6

Plucking

Answer 6

when the melt water beneath a glacier freezes and bonds the bottom of the glacier to the rocky surface below. As the glacier moves loose fragments of rock get plucked away leaving a jagged rock face

Question 7

Freeze thaw weathering

Answer 7

in the summer water gets into cracks in the rock and when it freezes it forces the rock move