Frozen Planet Flashcards
In what tome of the year do glaciers advance?
Summer
What time of the year do glaciers advance
Winter
What is a cold environment?
A cold environment is areas of land permanently covered by glaciers, ice sheets and have frozen soil/rock. The temperature is constantly below freezing
In a glacier what is the input?
Snow or avalanches
What is the process in a glacier?
The weight of the ice and gravity slowly makes the glacier move downhill. As it does this it transports sediment that has been dropped into the valley and it eroded
What is the output in a glacier?
The main outputs are ice and meltwater, together with vast amounts of sediment.
What are the two zones of a glacier known as?
Accumulation zone and the
Ablation zone
The accumulation zone is the outputs and the ablation zone is the
Outputs
What are the three types of erosion?
Abrasion
Plucking
Freeze flaw
What is abrasion?
It happens when rocks have frozen the base and the back of the glacier scrapes the bed rock.
What is plucking?
Plucking is when melt water from glaciers freezes to the base rock and lumps and cracks of broken rock. When the ice advances downhill, rock is plucked from the back wall.
What is freeze-thaw?
It is when melt water or rain gets caught into cracks in the bedrock. At night the water freezes and expands and causes the crack to get larger.
Eventually the rock will break away.
Do glaciers form mountains?
Yes
What are the features of a corrie?
Steep back wall
Shattered rock
Deep tarn lake
What is the fuel of glaciers?
Snow
