Ice on the land

All the Key Words for the Ice on the Land Topic for AQA Geography B Unit 1 which is Physical Geography. They are exactly how they are worded from the AQA textbook with a couple of extra 100% accurate facts also from the textbook and also BBC Bitesize films.

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  • Created by: Laura
  • Created on: 18-03-13 13:23
Glacial Period
A period of ice advance associated with falling temperatures.
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Interglacial Period
A period of ice retreat associated with rising temperatures.
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El Nino Effect
A periodic blip in the usual global climate characteristics caused by a short term reduction in the intensity of the cold ocean current that exists off the west coast of south america.
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Ice Sheet
a large body of ice over 50,000km in extent.
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Ice Cap
A smaller body of ice (less than 50,000km) usually formed in mountainous regions.
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Glacier
A finger of ice usually descending down hill from an ice cap and occupying a valley.
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Accumulation
Inputs to the glacier budget such as snowfall and avalanches.
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Ablation
Outputs from the glacier budget such as melting.
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Snout
The front of a glacier.
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Calving
Occasionally chunks of ice break away at the snout of the glacier.
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Sublimation
Where solid ice turns, by evaporation, to water vapour.
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Glacial Budget
The balance between the inputs (accumulation) and the outputs (ablation) of a glacier.
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Scree
Deposits of angular rock fragments found at the foot of rock outcrops
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Weathering
The break-up and decay of rocks
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Freeze-Thaw Weathering
The repeated freezing and thawing of water in cracks in rock
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Morraine
Sediment carried and deposited by the ice
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Hummock
A small area of raised ground rather like a mole hill
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Rotational Slip
Slippage of ice over a curved surface
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Bulldozing
The pushing of deposited sediment at the snout by the glacier as it advances
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Corrie
A deep depression on a hillside with a steep back wall,often containing a lake
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Arete
A knife edged ridge (jagged edge) often formed between two corries
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Pyramidal Peak
A sharp edged mountain peak
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Lateral Morraine
Material derived from freeze-thaw weathering of valley sides which is carried at the sides of the glacier.
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Recessional Morraine
Forms behind and parallel to the terminal morriane. They mark interruptions in the retreat of the glacier when it remains stationary for long enough for further ridges develop across the valley. Can act as dams behind which ribbon lakes can form.
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Terminal Morraine
Marks the maximum advance of a glacier. It is material deposited at the snout.If a glacier remains stationary for a long period then a sizable mound of material extending across the valley can build up.
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Medial Morriane
Found in the center of the glacier and results from two lateral morraines joining together.
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Ground Morriane
Material dragged underneath the glacier which, when deposited forms the valley floor. Often referred to as boulder clay.
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Glacial Trough
A wide,sharp sided valley eroded by a glacier
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Truncated Spur
An eroded interlocking spur characterized by having a very steep cliff.
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Hanging valley
A tributary glacial trough perched up on the side of a valley often marked by a waterfall
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Ribbon lake
A long narrow lake in the bottom of a glacial trough
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Drumlin
An egg-shaped hill found on the floor of a glacial trough
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Fragile Environment
An environment that is easily unbalanced and damaged by natural or human factors
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Avalanche
A rapid downhill movement of a mass of snow, ice and rocks usually in a mountainous environment that can reach speeds of 80mph.
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Loose Snow Avalanche
A powdery avalanche usually originating from a single point.
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Slab Avalanche
A large scale avalanche formed when a slab of ice and snow breaks away from the main ice pack
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Other cards in this set

Card 2

Front

A period of ice retreat associated with rising temperatures.

Back

Interglacial Period

Card 3

Front

A periodic blip in the usual global climate characteristics caused by a short term reduction in the intensity of the cold ocean current that exists off the west coast of south america.

Back

Preview of the back of card 3

Card 4

Front

a large body of ice over 50,000km in extent.

Back

Preview of the back of card 4

Card 5

Front

A smaller body of ice (less than 50,000km) usually formed in mountainous regions.

Back

Preview of the back of card 5
View more cards

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