When was the last Ice Age, and what was it called?
Pleistocene - 2.6 million years ago.
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What are ice sheets?
Huge masses of ice that cover whole countries.
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What are the three main sources of evidence in climate change?
Chemical evidence, geological evidence and fossil evidence.
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A glacier has two zones, what are they called and what do they mean?
Accumulation zone - upper part of glacier, input of snow and ice into glacier. Ablation zone - Lower part of glacier, output of water in glacier as it melts.
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What is the difference between the total of each of the glacier zones for one year called?
Glacial Budget.
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This difference in glacial zones shows in winter and summer it will...
Retreat in summer because of the negative glacial budget and advance in the winter because of a positive glacial budget.
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How does a glacier erode a landscape as they move?
By plucking (pulls pieces of rock out) and abrasion (rock below the glacier grind against rock in the ice).
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What are the seven different land forms created by glacial erosion?
An arete, pyramidal peak, truncated spurs, hanging valleys, glacial troughs, ribbon lakes and corries.
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When the ice carrying a material melts, the material is dropped onto the valley floor, what is this called?
Deposition
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What land forms does the dropped material make?
Moraines and drumlins.
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What are the four different types of Moraines?
Lateral, medial, terminal and ground moraine.
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What do drumlins look like?
They're blunt, round and steep at the upstream end, tapered, pointed and gently sloping at the downstream end.
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Name two environmental impacts tourism has on areas with snow and ice.
The environment is damaged by people trampling on the snow and soil beneath, causing soil erosion. Glacial landforms are eroded by walking on them. The developments such as ski lifts and buildings have visual imapcts on the environment.
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The areas whose economies rely on tourism with snow and ice are being affected by what?
Glacial retreat and unreliable snowfall.
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Name one social and one environmental impact on glacial retreat.
Social: Disruptions to power supplies from HEP leave unreliable power. Water supplies to settlements are reduced. Environmental: Causes flooding and rockslides, destroying habitats. Meltwater causes rising sea levels, destroying coastal habitats.
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Other cards in this set
Card 2
Front
What are ice sheets?
Back
Huge masses of ice that cover whole countries.
Card 3
Front
What are the three main sources of evidence in climate change?
Back
Card 4
Front
A glacier has two zones, what are they called and what do they mean?
Back
Card 5
Front
What is the difference between the total of each of the glacier zones for one year called?
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