Glaciers as Natural Systems (AQA A Level Geography)
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1/10- FrontGlacial Systems
Define the term glacier.
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Define the term glacier.
Glaciers are defined as large rivers (mass) of ice moving downhill under the influence of gravity.
Complete the missing labels for the glacial system.
Define the term ablation.
The term ablation means the removal of snow and ice from a glacier or iceberg by melting or evaporation.
What are the distinctive characteristics of a glaciated landscape?
The distinctive characteristics of a glaciated landscape are:
Glaciers.
Sharp mountain peaks.
Steep mountainsides and upper lakes.
Deep U-shaped valleys or troughs.
Features of deposition and erosion—striations left behind on rocks—tell the direction of ice travel.
Outwash plains and braided rivers.
State the two types of glaciers.
The two types of glaciers are constrained and unconstrained.
True or False?
Unconstrained glaciers are influenced by their surroundings.
False?
Unconstrained glaciers are not influenced by their surroundings.
Give an example of an unconstrained glacier.
Examples of unconstrained glaciers are:
Ice sheet or continental glacier.
Ice caps.
Ice shelves.
Give an example of a constrained glacier.
Examples of constrained glaciers include:
Piedmont glaciers.
Valley glaciers.
Cirque and niche glaciers.
True or False?
Ice shelves are only found in the Arctic.
False.
Ice shelves are only found in Greenland, Northern Canada, Antarctica and the Russian Arctic.
True or False?
Valley glaciers are the most common type of glacier.
False?
Cirque glaciers are the most common type of glacier and are found in nearly all areas where snow and ice accumulate.