Mass Wasting
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Questions and Answers

What is mass wasting?

  • The downward movement of rock, soil, and debris due to gravity (correct)
  • The upward movement of rocks and soil on a mountain slope
  • The horizontal movement of rocks and soil at the base of a mountain
  • The erosion caused by wind and rain on a mountain

    • Why does mass wasting occur?

  • Because of strong winds eroding the mountain
  • When gravitational forces overcome resistive forces holding the mountain together (correct)
  • Because of excessive vegetation on the mountain
  • Due to the growth of the mountain

    • How does slope steepness affect mass wasting?

  • It has no impact on mass wasting
  • It decreases the chances of mass wasting
  • It increases the likelihood of mass wasting (correct)
  • It causes rocks to flow uphill

    • What effect does excessive rainfall have on mass wasting?

    <p>Weakens the mountain's ability to resist gravity</p> Signup and view all the answers

    How does mass wasting differ in different mountains?

    <p>Some mountains have rocks falling like a fluid while others slide down in defined units</p> Signup and view all the answers

    What role does gravity play in mass wasting?

    <p>Gravity overcomes resistive forces causing downward movement of materials</p> Signup and view all the answers

    Which factor makes a hillside more prone to mass wasting?

    <p>Too much water weakening the hillside's resistance</p> Signup and view all the answers

    What happens to soil particles when there is too much rain or water on a mountain slope?

    <p>They break apart and lose their bond.</p> Signup and view all the answers

    Why are mountain slopes with decreased vegetation more susceptible to mass wasting?

    <p>They lack a protective plant covering above ground and anchoring roots below ground.</p> Signup and view all the answers

    What can cause sections of a mountain to detach due to violent shaking?

    <p>Earthquakes</p> Signup and view all the answers

    Which type of mass wasting involves the sliding of coherent rock materials along a curved surface?

    <p>Slump</p> Signup and view all the answers

    How is a rockslide different from a slump?

    <p>A rockslide moves in a more uniform direction.</p> Signup and view all the answers

    What characterizes a debris flow?

    <p>Movement of loose materials mixed with water down a slope like a fluid.</p> Signup and view all the answers

    What type of material typically develops an earthflow at the lower end of a slope?

    <p>Clay, silt, and fine pyroclastic material</p> Signup and view all the answers

    What happens when earthflows combine with moisture?

    <p>They ooze like an earthworm.</p> Signup and view all the answers

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