What are three kinds of mass movement in relation to landforms?

Question

My daughter's homework. Harcourt Science book level 5 IL.

Answer 1

creep:
Creep is a long term process. The combination of small movements of soil or rock in different directions over time are directed by gravity gradually downslope. The steeper the slope, the faster the creep.


Landslides:
Where the mass movement has a well-defined zone or plane of sliding, it is called a landslide. This includes rock slides, slumps and sturzstroms.


Flows:
Movement of soil and regolith that more resembles fluid behavior is called a flow. These include avalanches, mudflows, debris flows, earth flow, solifluction, lahars and sturztroms. Water, air and ice are often involved in enabling fluidlike motion of the material.

Answer 2

http://en.wikipedia.org/wiki/Mass_movement