Hazards and Natural Disasters
5 Questions
2 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 key difference between a hazard and a natural disaster?

  • A hazard only affects property, while a natural disaster affects both property and people.
  • A hazard is a natural event, while a natural disaster is a man-made event.
  • A hazard is a naturally occurring event, while a natural disaster is a human-made event.
  • A hazard is a potential threat, while a natural disaster is a realized event with negative consequences. (correct)
  • What makes lahars a volcanic hazard?

  • Lahars are a type of volcanic eruption that releases large amounts of molten rock and ash.
  • Lahars are formed by the accumulation of ash and rock on the volcano's slopes, potentially causing damage when mixed with water.
  • Lahars are caused by volcanic eruptions and pose a threat to life and property. (correct)
  • Lahars are the result of the buildup of pressure within the volcano, which can trigger an eruption.
  • Why is depth important in determining the magnitude of an earthquake?

  • The deeper the earthquake's focus, the more seismic waves are generated, leading to a higher magnitude.
  • The deeper the earthquake's focus, the more energy is released, resulting in a larger magnitude.
  • The deeper the earthquake's focus, the longer it takes for seismic waves to reach the surface, weakening their intensity. (correct)
  • The deeper the earthquake's focus, the more likely it is to cause a tsunami.
  • What geological feature is associated with the subduction zone?

    <p>The formation of volcanoes due to the melting of the descending plate. (B)</p> Signup and view all the answers

    What is the primary cause of the immense friction that occurs in subduction zones?

    <p>The sinking of denser oceanic crust beneath less dense continental crust. (A)</p> Signup and view all the answers

    Flashcards

    Hazard

    A naturally occurring event that poses risk to humans and property.

    Natural Disaster

    Occurs when a vulnerable population suffers loss of life or property due to a hazard.

    Lahar

    A volcanic hazard formed from volcanic ash, rocks, and water mixing during rainfall.

    Seismic Waves

    Energy waves that travel from the focus of an earthquake, weakening with distance.

    Signup and view all the flashcards

    Subduction Zone

    An area where oceanic crust sinks beneath continental crust, causing friction and movement.

    Signup and view all the flashcards

    Study Notes

    Hazards and Natural Disasters

    • A hazard is a naturally occurring event posing risk to humans and property.
    • A natural event is a hazard only if it affects humans.
    • Natural disasters occur when a vulnerable population experiences loss of life or property due to an event.

    Lahars

    • Lahars are a volcanic hazard.
    • They form when volcanic eruptions deposit loose rocks and ash on the volcano's slopes.
    • Rainwater mixes with this material, causing lahars to flow.
    • Lahars cause property and human damage.

    Magma and Earthquakes

    • Water and gases are dissolved in magma.
    • Earthquake magnitude is affected by distance from the focus.
    • Seismic waves travel further, the longer it takes, the more their energy dissipates.
    • Seismic waves are weaker and less intense at the epicenter.

    Subduction Zones

    • A subduction zone is where oceanic crust sinks beneath continental crust.
    • Plate movement in subduction zones creates friction.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Explore the concepts of hazards, natural disasters, and the geological phenomena associated with them. This quiz covers topics like lahar formation, magma characteristics, and subduction zones. Test your understanding of how these natural events impact human populations and property.

    More Like This

    Use Quizgecko on...
    Browser
    Browser