Glaciation

Question 1

Plucking

Answer 1

when ice freezes onto rocks and rips the rocks out as the glacier moves

Question 2

Abrasion

Answer 2

when ice scrapes along the land eroding it like sandpaper

Question 3

Freeze thaw weathering

Answer 3

1. water enters cracks in rocks
2. water freezes and widens the rock
3. pressure breaks up the rocks into scree.

Question 4

Formation of U - shaped valley

Answer 4

1. snow fall into a v-shaped valley and turns to ice
2. abrasion and plucking steepen deepen and widen the valley.
3. the valley is now a U-shape
4. The ice melts leaving a misfit stream or ribbon lake in the middle of the valley.

Question 5

Formation of a corrie

Answer 5

1. snow falls into a north-facing hollow
2. pluycking and abrasion steep deepen and widen the hollow
3. scree is formed due to freeze thaw weathering
4. the ice melts leaving a tarn in the middle of the armchair shaped hollow.

Question 6

Formation of an Arete

Answer 6

1. snow fall into 2 seperate hollows side to side.
2. the snow turns to ice erodes both hollows
3. As ice erodes both hollows this steepens the sides creating an arete

Question 7

Formation of a pyramid peek

Answer 7

1. snow fall into 3 seperate hollows
2. the snow turns to ice and erodes the hollows
3. this steepns the sides
4. This creates a pyramid peek at the top of all three aretes