Which sequence puts these phenomena in the correct order in terms of how fast they move material downslope, from slowest to fastest?
A)flows and landslides-slumping-avalanches-rockfall
B)slumping-flows and landslides-avalanches-rockfall
C)slumping-avalanches-flows and landslides-rockfall
D)rockfall-avalanches-flows and landslides-slumping

Question

Quizplus · Accepted Answer

Slumping is the slowest because it involves the gradual movement of material along a curved surface. Flows and landslides are next because they involve the movement of material in larger masses than slumping. Avalanches are faster than flows and landslides because they involve the movement of predominantly loose, granular material that can rapidly accelerate. Rockfall is the fastest because it involves the free-fall of individual rocks or small boulders.

Which Sequence Puts These Phenomena in the Correct Order in Terms