Mid Year Flashcards
What is glacial movement?
The process by which glaciers flow and change position over time.
True or False: Glaciers only move downhill due to gravity.
True
Fill in the blank: The primary force driving glacial movement is _____ .
gravity
What is internal deformation in glaciers?
The movement of ice within the glacier due to stress and strain.
What is the name of the area where a glacier loses ice?
Ablation zone.
True or False: The equilibrium line separates the accumulation zone from the ablation zone.
True
What happens to a glacier when the rate of ablation exceeds the rate of accumulation?
The glacier retreats.
Define ‘glacial till’.
Unsorted sediment deposited directly by a glacier.
What is a moraine?
A landform made of debris deposited by a glacier.
What is the difference between a terminal moraine and a recessional moraine?
A terminal moraine marks the furthest advance of a glacier, while a recessional moraine forms during a temporary halt in retreat.
Fill in the blank: Glacial striations are scratches on rock surfaces caused by _____ .
moving glaciers
What is a fjord?
A deep, narrow, and elongated sea or lake drain, typically formed by submergence of a glaciated valley.
True or False: Glaciers can influence sea levels.
True
What is the term for the melting of glaciers due to climate change?
Glacial retreat.
What role do glaciers play in the water cycle?
Glaciers store freshwater and release it slowly, impacting rivers and ecosystems.
What is an ice sheet?
A massive layer of ice covering a large area, typically found in polar regions.
Name one effect of glacial erosion.
Formation of U-shaped valleys.
Fill in the blank: The process of glaciers carving out the landscape is called _____ .
glacial erosion
What is a crevasse?
A deep crack in a glacier caused by stress and movement.
True or False: Glaciers can transport sediment over long distances.
True
What is the significance of glacial meltwater?
It provides essential water resources for ecosystems and human consumption.
What is the main cause of glacial melting in recent decades?
Climate change.
Define ‘permafrost’.
Ground that remains frozen for two or more consecutive years.
What is the impact of melting permafrost?
Release of greenhouse gases and destabilization of ground structures.
