Weathering, Soil, and Mass Movement

A mass movement that involves the sudden movement of a block of material along a flat, inclined surface is called a 

• slide
• rockfall
• slump
• flow

The process responsible for moving material downslope under the influence of gravity is called

• erosion
• weathering
• mass movement
• soil formation

What is the slowest type of mass movement?

• a slump
• a rockfall
• an earthflow
• creep

What factor commonly triggers mass movements?

• saturation of surface materials with water
• earthquakes
• removal of vegetation 
• all of the above

What is the force behind mass movements?

• the sun's energy
• flowing water
• gravity
• moving ice

Which of the following statements best describes a slump?

• slippage of a block of material moving along a curved surface
• blocks of rock sliding down a slope
• rapid flow of water-saturated debris, most common in mountainous areas
• slow downhill movement of soil and regolith

Telephone polls being tilted on a hill are an example of this type of mass movement.

• Slump
• Creep
• Rockfall
• Mudflow

Why is planting trees on a muddy slope a good idea to prevent mudflows and landslides?

• The tree roots soak up water
  
• The trees keep the soil in place
  
• Trees add homes for wildlife
  
• Just a and b
  

Rocks tumbling down a steep slope  would be an example of

• creep
• slump
• rockfall
• mudslide

Big chunks of land falling down a curved slope all at once would be an example of

• Slump
• Creep
• Rockfall
• Lahar