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20 True/False questions

  1. debris slideA sudden downslope movement of material consisting only of regolith.

          

  2. RockfallA sudden collapse of bedrock down a steep slope.

          

  3. LiquefactionThe transformation of seemingly solid sediment into a liquid-like slurry, in response to ground shaking.

          

  4. head scarpThe distinct step along the upslope edge of a slump where the regolith detached.

          

  5. talus arponThe distinct step along the upslope edge of a slump where the regolith detached.

          

  6. CreepDownslope movement in which a mass of regolith detaches from its substrate along a spoon-shaped sliding surface and slips downward semicoherently.

          

  7. undercuttingThe 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.

          

  8. debris flowA sudden collapse of disaggregated material on a steep slope.

          

  9. AvalancheA 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.

          

  10. debris fallA downslope movement of mud mixed with larger rock fragments.

          

  11. rock slideA sudden collapse of bedrock down a steep slope.

          

  12. slumpThe gradual downslope movement of regolith.

          

  13. solifluctionThe transformation of seemingly solid sediment into a liquid-like slurry, in response to ground shaking.

          

  14. LaharA 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.

          

  15. failure surfaceA wedge-shaped pile of rock fragments that accumulates at the base of a cliff.

          

  16. angle of reposeA wedge-shaped pile of rock fragments that accumulates at the base of a cliff.

          

  17. natural hazardA situation or setting caused by natural processes that can result in damage to society.

          

  18. mass movementThe gravitationally caused downslope transport of rock, regolith, snow, or ice.

          

  19. mudflowDownslope movement in which a mass of regolith detaches from its substrate along a spoon-shaped sliding surface and slips downward semicoherently.

          

  20. LandslideA sudden downslope movement of rock.