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21 Cards in this Set
- Front
- Back
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What are the two definitions of the North?
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Arctic
Sub arctic |
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What is permafrost?
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Perennially frozen Ground
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Frozen soil includes?
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Dry gravel
Soil with voids filed with ice Soil with excess ice |
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What things does the thickness of an active layer depend on?
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Security of winter
Soul rock type Grounds moisture content Snow cover Good drainage |
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Intrusive ice creates
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Pingos
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What Is another name for ground that freezes and thaws every year?
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Seasonally frozen Ground
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What is another name for frozen water?
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Pore ice
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What is created when water turns to ice under roads?
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Frost heaves
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Frost heave
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Expanding Ice pushed up the road and creates a hump.
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Layer of pure ice forms under the soil?
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Segregated Ice
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Cryosuction
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When pore ice attracts water which freezes and attracts more ice
Cause Frozen Ground to expand 50% |
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Subsea permafrost
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Frozen Ground under the ocean.
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Active layer
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Layer of ground that freezes and thaws every year.
Sits on top of permafrost |
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Two types of permafrost
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Continuous
Discontinuous |
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Continuous permafrost
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Exists under entire lands surface as an area
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Discontinuous
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Exists under only a few specific places
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Pingo
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Small hills
Underground ice pushes up top layers of soil. |
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What kind of landforms do frozen Ground create?
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Patterned ground
Ice wedges |
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Rock glaciers
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Rivers of rock dirt and ice slowly flow down hill.
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Thermokarst lakes
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Permafrost thaws and releases water
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Hummocks
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Water in the soil freezes and thaws
Smooth lumps of soil pushed up. |
