AS Geography 'Ice revision' 4.0 / 5 based on 2 ratings ? GeographyHot and cold environmentsASOCR Created by: JenCreated on: 10-01-13 20:56 What does the annual budget of a glacier describe? the input/output relationships of ice, firn and snow 1 of 15 What four processes can a glacier move by? Basal sliding; Creep; Extending-compressing flow; Internal deformation 2 of 15 What four categories can glaciers be put in? Corrie glacier; Valley glacier; Piedmont glacier; Ice sheet 3 of 15 What theories are there for the cause of glaciation? Milankovitch cycle; Varied sunspot activity; Varied carbon dioxide in atmosphere; Movement of ocean currents; Extreme volcanic activity 4 of 15 What is a corrie glacier? Occupies small hollows mainly on the sheltered north-facing slopes of mountains 5 of 15 What is a valley glacier? Linear masses of ice which move along pre-existing river valleys in the mountains 6 of 15 What is a piedmont glacier? Form when valley glaciers spread out on to low-lying areas and merge to form a single ice mass 7 of 15 What is an ice cap/sheet? An extremely large mass of ice which covers whole mountain ranges or whole continents e.g. Antarctica 8 of 15 Name an input of a glacier Falling snow and sometimes avalanches 9 of 15 Name a store of a glacier The glacier itself is a store, in the form of frozen water 10 of 15 Name an output of a glacier Evaporation; Melting; Calving (ice breaks off into water) 11 of 15 What is the zone of accumulation? The upper part of a glacier where inputs exceed outputs 12 of 15 What is the zone of ablation? The lower part of a glacier where outputs exceed inputs 13 of 15 What is meant by the term 'net balance'? The difference between accumulation and ablation for a whole glacier over a year 14 of 15 What are corrie lakes, or tarns, used for? Hydro-electric power (HEP) 15 of 15
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