Features part 3

Question 1

What is an arête?

Answer 1

Knife ridge between 2 corries

Question 2

When are arêtes formed?

Answer 2

When two neighbouring corries run back to back. As glacier eroded either side of ridge, the edge becomes steeper

Question 3

What is a trough?

Answer 3

Also known at a U shaped valley, it’s a straight flat-bottomed steep sided valley

Question 4

How are glacial troughs formed?

Answer 4

Glaciers flow down existing river valleys via basal sliding under gravity and eroded the sides and floor cause the shape to become deeper and straighter

Question 5

What landforms are predominantly influenced by erosion?

Answer 5

-corrie
-arêtes
-pyramidal peaks
-through
-roche moutonee
-striations

Question 6

Corrie step by step:

Answer 6

Nivation, plucking, abrasion, deposition, freeze thaw

Question 7

How are roche mountonee formed?

Answer 7

Hard rock on one side and rock has been eroded on the other side, so abrasion happens (striations) on eroded side and plucking on the steep side

Question 8

What is scree?

Answer 8

loose rock