Geology Quiz: Metamorphic Rocks and Earthquakes
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Questions and Answers

What is the primary function of index minerals in metamorphic rocks?

  • They are found in large quantities
  • They indicate the presence of oil or gas
  • They show the range of pressures and temperatures the rock experienced (correct)
  • They are stable under a wide range of pressures and temperatures
  • What is the relationship between the units on the Richter scale?

  • Each unit represents a 30-fold increase in energy (correct)
  • Each unit represents a 15-fold increase in energy
  • Each unit represents a 60-fold increase in energy
  • Each unit represents a 10-fold increase in energy
  • What type of seismic waves spread in all directions from the focus of an earthquake?

  • L and T waves
  • P and T waves
  • P and S waves (correct)
  • S and L waves
  • What is the primary natural cause of earthquakes?

    <p>Convection currents in the Earth's mantle</p> Signup and view all the answers

    Where do earthquakes mostly occur?

    <p>Along the edges of tectonic plates</p> Signup and view all the answers

    Where is the focus of an earthquake located?

    <p>Within the Earth's lithosphere</p> Signup and view all the answers

    What do index minerals in metamorphic rocks indicate?

    <p>The range of pressures and temperatures the rock experienced</p> Signup and view all the answers

    What is the multiplier of energy represented by each unit on the Richter scale?

    <p>31 times</p> Signup and view all the answers

    What is the primary cause of the enormous pressure that leads to earthquakes?

    <p>Tectonic plates rubbing against each other</p> Signup and view all the answers

    At what location do the two types of seismic waves originate from?

    <p>The focus of the earthquake</p> Signup and view all the answers

    What is the name of the device used to measure the strength of an earthquake?

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

    What is the location of the majority of earthquake occurrences?

    <p>Along the edges of tectonic plates</p> Signup and view all the answers

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