Mountains and glaciers 0.0 / 5 ? Environmental Science/StudiesEnvironmental GeographyUniversityNone Created by: Emmajayne798Created on: 15-03-16 09:43 What is a mountain? No actual definition. Extreme upland (differentiate from hills) 1 of 14 How are mountains formed? Geological processes/large scale movements of the Earth's crust. e.g. Volcanism, plate movements, folding, faulting etc. 2 of 14 What characteristics do mountains usually have? Steep? Peaks. Rocky and barren? Trees on lower slopes. Possibly snow and ice at higher altitudes. 3 of 14 What is a plateau? A broad flat area of "appreciable" elevation above the surrounding lands. Often formed by lava flows- undeformed sediments. 4 of 14 What influences the type of movement of material down a mountain slope? Type of material (i.e. physical properties, moisture content) 5 of 14 List some types of movement of material downslope. Creeping, flowing, slumping, falling, mudflow, rock fall, debris slide. 6 of 14 When does material move? When external stress>strength of inter-particle pressures and friction. 7 of 14 Why are high altitudes less habitable for human settlement? Extreme conditions- higher UV, lower O2 concentrations (air is thinner), colder with increasing height, rocky terrain- unsuitable for agriculture, harsher weather. 8 of 14 How do slopes affect the downslope environment? Deliver water and sediment to streams. Flow of water removes and transports material-modifies the landscape (erosion and deposition). 9 of 14 Examples of mountain ranges? Rockies, N.America; Andes, S. America; Himalayas, C. Asia. 10 of 14 What is used to work out if glaciers will form on mountains or not? Nivometric co-efficient = Snow: Rain 11 of 14 What happens if the Nivometric co-efficient is 1? 0? 1- precipitation= all snow 0=all Rain 12 of 14 What can affect the Nivometric co-efficient value? Air temperature (altitude, latitude, proximity to ocean (maritime climate) 13 of 14 What other than the Nivometric co-efficient can influence where glaciers form? Aspect of slopes- North facing= less insolation. Biome type-desert? (Some regions of Antarctica=no precipitation for 100's years). 14 of 14
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