ice on land revision

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Axial rotation-cause of ice ages
it means the earth is different distances from the sun so different temperatures.
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How does glacial ice form (1)
air has to be moist and cold
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How does glacial ice form (2)
summer has to be cold too to avoid excess ablation
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How does glacial ice form (3)
snow changes shape slightly
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How does glacial ice form (4)
it becomes compact (more pressure) and becomes ice
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glacial budget definition
difference between total accumulation (gain) and total ablation (loss)
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how does latitude affect glacial budget?
rays more direct near equator so more ablation
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how does prevailing wind affect glacial budget?
if it has come from the sea, air is colder and more moist so more accumulation
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how does altitude affect glacial budget?
higher up the air is thinner so less heat trapped, more accumulation
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how does aspect (angle it faces) affect glacial budget?
if glacier is south-facing it will receive more sun depending on the direction of the sun, if temps were higher (facing sun) more ablation on that side of mountain
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how does global warming affect glacial budget?
increase in global temps, more ablation due to snow melting
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formation of corrie (1)
begins as hollow in mountain containing glacier
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formation of corrie (2)
moves downhill due to meltwater (and friction) and gravity
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formation of corrie (3)
moves in circular motion (rotational slip)
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formation of corrie (4)
erosion such as plucking/abbrasion causes a deep depression in the hillside
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formation of arete (1)
two glaciers flow in parallel valleys
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formation of arete (2)
glaciers erode sides of valley
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formation of arete (3)
sharpens ridge between them
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formation of arete (4)
the arete is the sharp ridge formed between two corries
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formation of pyramidal peak (1)
pointed mountain peak with at least three sides
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formation of pyramidal peak (2)
formed when at least 3 back-to-back glaciers erode a mountain
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formation of truncated spurs (1)
when a glacier erodes a valley
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formation of truncated spurs (2)
interlocking spurs cut off forming truncated spurs
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formation of hanging valley (1)
when tributary glaciers flow into a main glacier
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formation of hanging valley (2)
glacial trough eroded more deeply by this glacier
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formation of hanging valley (3)
when the glaciers melt the valleys are left at a higher level
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formation of u shaped valley (1)
start of as v shaped river valleys
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formation of u shaped valley (2)
as glacier erodes the sides it becomes u shaped
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formation of ribbon lake (1)
long, thin lakes formed after a glacier retreats
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formation of ribbon lake (2)
form in hollows where softer rock was eroded more than the surrounding hard rock
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formation of misfit stream (1)
small streams in glaciated valleys formed when the glacial ice melts
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formation of misfit stream (2)
it is not in proportion to the size of the valley
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lateral moraine
material deposited at side of glacier
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medial moraine
centre of valley where 2 glaciers met
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terminal moraine
builds up at snout
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ground moraine
thin layer deposited over a large area
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formation of drumlins (1)
elongated hills of glacial deposits
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formation of drumlins (2)
upstream - round, blunt, steep
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formation of drumlins (3)
downstream - tapered, pointed, gently sloping
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Card 2

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How does glacial ice form (1)

Back

air has to be moist and cold

Card 3

Front

How does glacial ice form (2)

Back

Preview of the front of card 3

Card 4

Front

How does glacial ice form (3)

Back

Preview of the front of card 4

Card 5

Front

How does glacial ice form (4)

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