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20 Multiple choice questions

  1. The distinct step along the upslope edge of a slump where the regolith detached.
  2. The gradual downslope movement of regolith.
  3. The detachment or sliding horizon on which downslope movement of rock or debris occurs.
  4. A turbulent cloud of debris mixed with air that rushes down a steep hill slope at high velocity; the debris can be rock and/or snow.
  5. Downslope movement in which a mass of regolith detaches from its substrate along a spoon-shaped sliding surface and slips downward semicoherently.
  6. A situation or setting caused by natural processes that can result in damage to society.
  7. The gravitationally caused downslope transport of rock, regolith, snow, or ice.
  8. A thick slurry formed when volcanic ash and debris mix with water, either in rivers or from rain or melting snow and ice on the flank of a volcano.
  9. Excavation at the base of a slope that results in the formation of an overhang.
  10. A downslope movement of mud at slow to moderate speed.
  11. The transformation of seemingly solid sediment into a liquid-like slurry, in response to ground shaking.
  12. A sudden downslope movement of material consisting only of regolith.
  13. The angle of the steepest slope that a pile of uncemented material can attain without collapsing from the pull of gravity.
  14. The type of creep characteristic of tundra regions; during the summer, the uppermost layer of permafrost melts, and the soggy, weak layer of ground then flows slowly downslope in overlapping sheets.
  15. A sudden movement of rock and debris down a nonvertical slope.
  16. A sudden collapse of bedrock down a steep slope.
  17. A sudden collapse of disaggregated material on a steep slope.
  18. A downslope movement of mud mixed with larger rock fragments.
  19. A wedge-shaped pile of rock fragments that accumulates at the base of a cliff.
  20. A sudden downslope movement of rock.