Mass Wasting Fundamentals and Prevention

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Questions and Answers

What is the term used to refer to all movement downslope?

  • Landslide
  • Debris flow
  • Rock topple
  • Mass wasting (correct)

Which term describes moving blocks of bedrock during a mass-wasting event?

  • Rock topple (correct)
  • Landslide
  • Debris flow
  • Rockfall

What type of mass wasting involves dominantly liquid material movement?

  • Rock topple
  • Rockfall
  • Flow (correct)
  • Rock slide

In which regions, due to their topography and rainfall, are hazardous mass-wasting events particularly likely to occur?

<p>California coast, Rocky Mountain Region, and Pacific Northwest (C)</p> Signup and view all the answers

When does a slope fail in the context of mass wasting?

<p>When it is too steep and unstable for existing materials and conditions (B)</p> Signup and view all the answers

What is a general term for fast-moving geologic material involved in mass wasting?

<p>Landslide (A)</p> Signup and view all the answers

What are the two principal factors that ultimately determine slope stability?

<p>Shear strength and slope angle (D)</p> Signup and view all the answers

Which force acting on a slope pushes the block down the slope?

<p>Shear force (fs) (B)</p> Signup and view all the answers

What is the relationship between shear force and normal force known as?

<p>Shear strength (C)</p> Signup and view all the answers

What does the angle of repose represent?

<p>The stable angle at which material will not move downslope (D)</p> Signup and view all the answers

How does adding water to a sand pile affect the angle of repose?

<p>Increases the angle of repose (B)</p> Signup and view all the answers

What component can significantly change the shear strength of a particular slope?

<p>Water content (D)</p> Signup and view all the answers

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