Exam 11: Mass Wasting

In the ____________________ method of protecting slopes,material is removed from the top of the slope and used as fill at the base.

____________________ are sometimes used to fasten unstable bedrock to stable strata.

Permafrost lies beneath ____ percent of the land surface on Earth.

What is the most important step that can be taken to minimize or eliminate mass wasting or damage from it?

The type of mass wasting that is responsible for the greatest amount of property damage is what?

A loud thunderclap may be sufficient to trigger a landslide of an unstable slope.

_______ adds weight to the slope material,decreases inter-grain friction,and lubricates the base of an unstable slope.

The material accumulated at the base of cliffs where rocks fall is known as ____________________.

A slope material's strength and cohesion,the amount of internal friction between grains,and any external support of the slope define a slope's

Creep is the most economically damaging and widespread type of material flow.

Landslide is

Creep occurs only on weathered or soil-covered surfaces of moderate slope.

Damage to homes by mass wasting

Why is La Conchita,California particularly vulnerable to landslides?

Some mass wasting occurs at almost imperceptibly slow rates.

A rapid down slope mass movement of snow and ice is called a(n)____________________.

Because water can be so important in mass movement,what is one of the most effective and inexpensive ways of reducing mass wastage risk and damage?

How does a slump differ from a rock slide?

Slow mass movement transports a greater volume of material than does rapid mass movement.

Mass movement in which material move as a viscous fluid or plastically is termed _______.