Keyterms for Rivers Unit 0.0 / 5 ? GeographyWater and riversGCSEAQA Created by: Ankita98Created on: 10-04-14 22:44 Abrasion the way rocks in rivers or glaciers scrape and erode the rocks they are moving over 1 of 22 Attrition the way that rocks in rivers are worn down by rubbing against each other 2 of 22 Solution (Erosion) Slightly acidic water dissolving rocks 3 of 22 Hydraulic Action Shear force of water eroding the edges of a river 4 of 22 transportation the carrying of rock particles 5 of 22 Traction Pebbles and larger sediment are rolled along the sea bed. 6 of 22 Saltation Load is bounced along the sea bed, eg small pieces of shingle or large sand grains. 7 of 22 Suspension Small particles are carried in water, eg silts and clays, which can make the water look cloudy. 8 of 22 Solution (Transportation) Load can come from cliffs made from chalk or limestone, and calcium carbonate is carried along in solution. 9 of 22 Deposition the dropping of rocks and other materials by e.g. glaciers and rivers 10 of 22 Alluvium material deposited by a river 11 of 22 Delta an area of alluvium at the mouth of a river when it has split up into distributaries 12 of 22 flood plain a wide valley, usually in the lower course of a river 13 of 22 meander a large bend in a river 14 of 22 oxbow lake a former meander of a river 15 of 22 mouth the end point of a river where it reaches the sea or a lake 16 of 22 river beach a build up of material deposited in the inside bend of a river 17 of 22 river cliff the steep bank made by erosion on the outside bend of a river 18 of 22 source the start of a river 19 of 22 tributary a smaller river which flows into a larger one 20 of 22 U-shaped valley one that has steep sides and a flat bottom 21 of 22 V-shaped valley a valley that has been eroded by a river 22 of 22
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