Glaciation

Question 1

What are the different forms of zach cornetto and erosion

Answer 1

Freeze-thaw weathering, abrasion and plucking

Question 2

How much does water expand by when it freezes

Answer 2

9%

Question 3

What direction do corries face

Answer 3

North - North East

Question 4

How is an arête formed

Answer 4

An arête is a knife-edge ridge close ridge, a long and narrow chain of mountains.. It is formed when two corries run back to back

Question 5

How is a pyramidial peak formed

Answer 5

Snow gathering in three or more hollows back to back. It compresses turning into firn and then ice

Question 6

What is plucking

Answer 6

Plucking is a process of erosion that occurs during glaciation. As ice and glaciers move, they scrape along the surrounding rock and pull away (plucking) pieces of rock which causes erosion.

Question 7

What is freeze-thaw weathering

Answer 7

Freeze-thaw weathering is a process of erosion that happens in cold areas where ice forms. A crack in a rock can fill with water which then freezes as the temperature drops. As the ice expands, it pushes the crack apart, making it larger.

Question 8

What is abrasion

Answer 8

As a glacier flows downslope, it drags the rock, sediment, and debris in its basal ice over the bedrock beneath it, grinding it. This process is known as abrasion and produces scratches (striations) in bedrock surface.

Question 9

How do glaciers form

Answer 9

Glaciers form when snow accumulates overtime, compacting into ice. The weight of the ice causes it to move downhill shaping the landscape