Pyroclastic Material and Ash Exercise

Pyroclastic Material and Ash

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Pyroclastic Material and Ash

Examine pyroclastic material and fine volcanic ash released during violent eruptions. Learn how these airborne rocks and particles form and travel through the atmosphere.

Questions

  1. MultiChoice

    What is pyroclastic material?

  2. MultiChoice

    What is volcanic ash?

  3. MultiChoice

    What is a pyroclastic flow?

  4. MultiChoice

    Why are pyroclastic flows so dangerous?

  5. MultiChoice

    What are volcanic bombs?

  6. MultiChoice

    Pea-sized to walnut-sized pyroclastic particles are known as what?

  7. MultiChoice

    What rock forms when volcanic ash settles and compresses together?

  8. MultiChoice

    What light, frothy volcanic rock has so many air holes that it can float on water?

  9. MultiChoice

    What dark volcanic glass forms when lava cools almost instantly without crystal growth?

  10. MultiChoice

    How can thick volcanic ash clouds affect airplane engines?

  11. MultiChoice

    What hazard occurs when volcanic ash mixes with heavy rain or melting snow?

  12. MultiChoice

    Which historic city was buried by pyroclastic ash from Mount Vesuvius in 79 AD?