Volcanic Hazards and Safety Measures
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Questions and Answers

What is a volcanic hazard?

  • A volcanic process that causes damage to life or property (correct)
  • The injection of magma into volcanic rock
  • A natural disaster that occurs near a volcano
  • A lava flow that rushes down the slope of a volcano

What can cause the slopes of a volcano to become unstable?

  • The accumulation of volcanic ash on the slopes
  • Earthquakes caused by tectonic plate movements
  • Magma getting injected into the volcanic rock (correct)
  • Erosion of the volcanic mountain over time

What is a landslide?

  • A large ocean wave caused by a volcanic eruption
  • A mass movement of rock fragments, soil and debris downslope (correct)
  • The gradual erosion of a volcanic mountain over time
  • A violent expulsion of lava and ash from a volcano

What is the most remarkable feature of a volcano?

<p>The red-hot lava rushing down the slope (A)</p> Signup and view all the answers

What can a volcanic eruption trigger besides lava flow?

<p>Earthquakes and tsunamis (D)</p> Signup and view all the answers

What is the purpose of the lesson described in the text?

<p>To learn about volcanic hazards and how to prevent them (B)</p> Signup and view all the answers

What is the main difference between lava and other volcanic hazards?

<p>Lava is the most visually striking feature of a volcanic eruption (A)</p> Signup and view all the answers

What causes a volcanic earthquake?

<p>Pressure and stress from volcanic activity (B)</p> Signup and view all the answers

How do lahars differ from landslides?

<p>Lahars carry volcanic debris and water, while landslides do not. (D)</p> Signup and view all the answers

What is the potential danger of a lahar mixing with water?

<p>It increases the speed of the lahar flow. (C)</p> Signup and view all the answers

How do communities attempt to protect themselves from lahars?

<p>By constructing barriers to prevent the flow of lahars (D)</p> Signup and view all the answers

What is one potential impact of a lahar damming waterways?

<p>Risk of flooding upstream (C)</p> Signup and view all the answers

Why are lahars described as resembling 'a river of wet cement'?

<p>To compare their dense and destructive nature (C)</p> Signup and view all the answers

What makes lahars impossible to outrun, according to the text?

<p>Their high speeds, traveling tens of meters per second (C)</p> Signup and view all the answers

How does a lahar differ from a volcanic earthquake?

<p>A lahar involves the flow of volcanic debris and water, while a volcanic earthquake does not. (C)</p> Signup and view all the answers

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