5 Written questions
5 Matching questions
- alluvial terraces
- a bench-like landforms that are carved in alluvium by a stream during degradation
- b glacially deposited sediment piles
- c low oval hill made of deposited till, molded by overriding glacier, upstream side is steep, downstream side is tapered - long axis parallel to direction of ice flow
- d small lake that occupies a rock basin in a cirque or glacier through
- e accumulation of wind-blown fine sediment from cold regions with no vegetation. can be derived from galcial outwash deposits or glacial erosion
5 Multiple choice questions
- all debris deposited by glacier.
- frozen ground
- a mass of ice that forms on land due to a multilayer surplus of snowfall over snowmelt. Effective agents of erosion and deposition.
- steep-sided, shard edged bedrock ridge formed by two glacials eroding on oposite sies of a ridge
- long, straight scratches (evidence of glacier) - rates of up to 5 mm/yr. influenced by amount of debris, basal sliding velocity, ice thickness (pressure), hardness of bedrock, basal water pressure and removal of rock material
5 True/False questions
3 types of erosion → Solution (dissolved) - suspended load - bed load
ice fields → not enough ice for dome, flow is constrained by topography
physical weathering - thermal expansion → volume change due to change in temperature. Heating - expansion. Cooling - contraction. rocks and minerals expand in response to daily heating and cooling, seasonal heating and cooling and wildfires. For effectiveness requires frequent and extreme fluctuations.
How does sediment enter rivers? → - slope erosion (sheet, rill, gully) - mass movement (landslide, etc) - recruitment of sediment from bed and bands
Suspended load → suspended because of turbulent eddies, very fine (silt, clay) - 90% of sediment load - from slopes, banks and channel bed - depends on discharge and sediment availability