Mass Movement of Earth Materials

Front

Mass Movement is

Back

movement of earth materials resulting from the force of gravity

Front

Mass wasting (or movement) occurs when ____

Back

gravitational force exceeds shear strength

Front

A slope material’s strength and cohesion, the amount of internal friction between grains, and any external support of the slope define that slope’s ____.

Back

shear strength

Front

How does water contribute to mass wasting (or mass movement)?

Back

Water adds weight and reduces friction.

Front

Mass movements are classified according to

Back

speed of movement, type of movement, type of material

Front

Slow mass movements (such as creep) ____

Back

are characterized by tilted trees and cracked foundations

Front

____ is a slow movement along a curved surface that typically involves poorly consolidated material.

Back

slump

Front

The primary cause of slumps is ____.
Options: earthquakes, steep slope angle, erosion at the base of the slope, overburdening

Back

erosion at the base of the slope

Front

Debris flows are different from mudflows in that they ____.

Back

are composed of larger particles

Front

When clays liquefy and flow like water, what type of mass movement is caused?

Back

quick clays