Understanding Volcanoes
19 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main reason why pyroclastic surges are more dangerous to humans compared to pyroclastic flows?

  • Pyroclastic surges contain poisonous gases and steam that can suffocate people. (correct)
  • Pyroclastic flows travel at higher speeds than pyroclastic surges.
  • Pyroclastic surges can travel farther away from the volcano than pyroclastic flows.
  • Pyroclastic surges are less likely to cause death than pyroclastic flows.

    • What is the main difference between pyroclastic flows and tephra?

  • Pyroclastic flows are propelled at higher speeds than tephra.
  • Tephra are associated with more poisonous gases than pyroclastic flows.
  • Pyroclastic flows have larger solid particles compared to tephra.
  • Tephra are larger chunks of rocks ejected from a volcano compared to pyroclastic flows. (correct)

    • Which volcanic eruption resulted in the destruction of the city of Saint Pierre and the death of more than 29,000 people due to a pyroclastic surge?

  • Mount Tambora eruption in 1815
  • Mount Etna eruption in 1669
  • Mount Pelee eruption in 1902 (correct)
  • Taal Volcano eruption in 1911

    • Why is tephra particularly destructive to individuals and their property?

    <p>Their huge size and weight make them destructive upon impact.</p> Signup and view all the answers

    What impact can the thick layers of ash associated with tephra have on respiratory health?

    <p>They can significantly impact respiratory health across a wide region.</p> Signup and view all the answers

    How did tephra contribute to the death of nearly 80,000 people during the 1815 Tambora eruption?

    <p>By destroying food supplies due to vegetation destruction.</p> Signup and view all the answers

    What happens when tephra is ejected high into the atmosphere during a volcanic eruption?

    <p>It becomes electrically charged and can produce lightning.</p> Signup and view all the answers

    What is a potential hazard associated with tephra that has caused fatalities in volcanic eruptions like Mount Pelee and Tambora?

    <p>Lightning strikes that result in fatalities.</p> Signup and view all the answers

    Apart from destruction, what was another impact of tephra during the Tambora eruption?

    <p>Famine due to loss of food supplies</p> Signup and view all the answers

    What is the main reason why pyroclastic surges are more likely to cause death in humans?

    <p>The combination of poisonous gases and steam in the pyroclastic clouds</p> Signup and view all the answers

    What is the main characteristic that distinguishes tephra from pyroclastic flows?

    <p>Tephra consists of much larger chunks of rocks and debris</p> Signup and view all the answers

    What were the primary factors that caused the death of 1,335 individuals during the 1911 Taal Volcano eruption?

    <p>Toxic gases and ash ejected from the volcano</p> Signup and view all the answers

    How do tephra travel long distances and cause significant destruction?

    <p>By being propelled at high speeds from the volcano</p> Signup and view all the answers

    What makes tephra particularly destructive to individuals and their property?

    <p>The large size and weight of tephra pieces</p> Signup and view all the answers

    What makes pyroclastic surges more lethal to humans compared to pyroclastic flows?

    <p>The steam and gases in the pyroclastic clouds</p> Signup and view all the answers

    During a volcanic eruption, what is one of the potential hazards associated with tephra expulsion?

    <p>Creation of volcanic lightning strikes near the volcano</p> Signup and view all the answers

    Why are pyroclastic surges considered particularly hazardous?

    <p>They release toxic gas clouds that spread quickly post-eruption</p> Signup and view all the answers

    Which characteristic makes tephra particularly dangerous for those near a volcanic eruption?

    <p>The high speeds at which tephra travels away from the volcano.</p> Signup and view all the answers

    What factor contributed significantly to the deaths associated with tephra during volcanic eruptions like Mount Pelee and Tambora?

    <p>The toxic combination of gases in tephra.</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser