Spatial Distribution and Volcanic Activity Quiz
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Questions and Answers

What is used to measure the magnitude of volcanic eruptions?

  • Mercalli Scale
  • Richter Scale
  • Volcanic Explosivity Index (VEI) (correct)
  • Moment Magnitude Scale

Which type of volcanic eruptions are characterized by being more explosive?

  • High frequency
  • Calmer
  • Intense high magnitude (correct)
  • Effusive

What determines whether volcanic eruptions are effusive or explosive?

  • Frequency of eruptions
  • Type of boundary
  • Magnitude of the eruption (correct)
  • Duration of the eruption

How many volcanoes erupt each month on average?

<p>50-60 volcanoes (D)</p> Signup and view all the answers

What does the regularity of volcanic eruptions help in predicting?

<p>Timing of eruptions (B)</p> Signup and view all the answers

Which scale is used for measuring volcanic explosivity where the more powerful the eruption, the more explosive it is?

<p>Volcanic Explosivity Index (VEI) (D)</p> Signup and view all the answers

What is one of the hazards associated with volcanoes mentioned in the text?

<p>Lava flows (C)</p> Signup and view all the answers

What makes lava viscous and slow, leading to explosive eruptions?

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

What is the name given to clouds of burning hot ash and gas that collapse down a volcano at high speeds?

<p>Nuées ardentes/pyroclastic flows (A)</p> Signup and view all the answers

Which type of rock ejected by a volcano is referred to as Tephra?

<p>Any type of rock ejected by a volcano (B)</p> Signup and view all the answers

What causes Glacial floods known as jökulhlaups?

<p>High temperatures melting ice at high latitudes (D)</p> Signup and view all the answers

Which hazardous event is specifically caused by melting ice at high latitudes?

<p>Glacial floods (jökulhlaups) (B)</p> Signup and view all the answers

What method can be used to respond to volcanic hazards directly?

<p>Preventing them directly (A)</p> Signup and view all the answers

What is a primary environmental effect of volcanic hazards?

<p>Wildlife killed (C)</p> Signup and view all the answers

Why is there no definite prediction for a volcanic eruption?

<p>Gases releasing can indicate an imminent eruption (D)</p> Signup and view all the answers

How can the effects of volcanic hazards be reduced?

<p>Mitigating the effects (D)</p> Signup and view all the answers

What can happen if plates become stuck due to friction between them?

<p>Seismic hazards (B)</p> Signup and view all the answers

Which of the following is a secondary economic effect of volcanic hazards?

<p>Conflicts concerning government response, food shortages, insurance etc. (C)</p> Signup and view all the answers

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