Glacier Key Terms 0.0 / 5 ? GeographyGlacial landscapes and processesGCSEOCR Created by: ElinCrosslandCreated on: 15-02-15 12:24 Freeze Thaw Weathering (FTW) When melt water enters cracks and expands by 10% causing the rock to shatter 1 of 15 Plucking When ice freezes to rocks and pulls them out by the movement of the ice frozen to them 2 of 15 Basal slide Where melt water lubricates the ice so it slides downhill 3 of 15 Internal Deformation Where ice moves through cracking and breaking 4 of 15 Abrasion Rocks in the glacier sides and base scrape away at the rock below like sandpaper 5 of 15 Bull-dozing Where the snout of the glacier pushes through obstacles as the glacier advances 6 of 15 Glacier A finger of ice found in a mountain valley 7 of 15 Calving The process where large chunks of ice break off the end of a glacier into the sea. Sudden change 8 of 15 Deposition Where the glacier drops the material it has been carrying 9 of 15 Ice Sheet An expanse of ice over 50,000km squared 10 of 15 Ice Cap An expanse of ice less than 50,000km squared 11 of 15 Zone of ablation The part of a glacier where the outputs are higher than the inputs 12 of 15 Zone of accumulation The part of a glacier where inputs are higher than outputs 13 of 15 Glacial Budget The balance between inputs and outputs determining if a glacier will advance or retreat 14 of 15 Rotational Slip Where the glacier moves over and erodes a curved surface 15 of 15
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