Rocks and Stress Deformation
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Questions and Answers

What happens to rocks under stress?

  • They become heavier
  • They shrink in size
  • They deform (correct)
  • They become transparent
  • Which type of stress is comparable to pulling on a string from both ends after it has been fully extended?

  • Normal stress
  • Shear stress
  • Tensional stress (correct)
  • Compressional stress
  • What type of deformation involves the rock changing size or shape but the change is reversible?

  • Brittle deformation
  • Elastic deformation (correct)
  • Ductile deformation
  • Plastic deformation
  • In which direction does rock slip under shear stress?

    <p>Horizontal direction</p> Signup and view all the answers

    How does compressional stress affect rocks?

    <p>Presses them together</p> Signup and view all the answers

    What does it mean for rocks to experience ductile deformation?

    <p>Rocks can be reshaped, but once changed, they stay that way.</p> Signup and view all the answers

    How do ductile materials like copper and ductile rocks respond to stress?

    <p>They flow in response to stress.</p> Signup and view all the answers

    What is the main difference between ductile and brittle rocks?

    <p>Ductile rocks flow under pressure, while brittle rocks crack or fracture easily.</p> Signup and view all the answers

    How does temperature affect the deformation of rock material?

    <p>At high temperatures, rock material becomes more ductile and flows more easily.</p> Signup and view all the answers

    Why does the presence of water affect the brittleness of a rock?

    <p>Less water makes the rock more brittle and prone to breaking.</p> Signup and view all the answers

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