Test 2 (Volcano Activities 4,5&7)

15 Questions | Total Attempts: 693

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Test 2 (Volcano Activities 4,5&7)

This is an open-book, open-note test covering Activities 4,5, & 7. You may only take this test once! Once completed, please record your score on your homework p. 56 #1-4. You have until midnight 3/14 Sunday to complete it.


Questions and Answers
  • 1. 
    When a volcano erupts, particles other than lava are released in the atmosphere . The collective term is called tephra. What is the name for the LARGEST tephra? (HINT: p.34)
    • A. 

      Asteriod

    • B. 

      Volcanic bomb

    • C. 

      Lapili

    • D. 

      Ash

  • 2. 
    What is the name for the smallest tephra? Often times, if it gets stuck in helicopter's or car's motor, it will cause vehicles to fail. Also, it travels the farthest from the eruption site.  (HINT: 34)
    • A. 

      Smoke

    • B. 

      Volcanic bomb

    • C. 

      Lapilli

    • D. 

      Ash

  • 3. 
    When soaked by rain, loose ash can form ________, or volcanic mudslides. (HINT: p.34) 
    • A. 

      Pyroclastic flows

    • B. 

      Lahars

    • C. 

      Volcanic bombs

  • 4. 
    Analyze the ash distribution of the Mt. St. Helens  eruption. Which direction did the ash go?
    • A. 

      North

    • B. 

      East

    • C. 

      South

    • D. 

      West

    • E. 

      Both B & C

  • 5. 
    True or False: A lot of ash blew into Canada after the Mt. St. Helen's eruption.
    • A. 

      True

    • B. 

      False

  • 6. 
    VEI stands for Volcanic Explosivity Index. This scale measures the volume of lava & tephra & the height it reached post eruption. Thus, the higher the VEI number, the more erupted material & the higher it went. True or False: High VEI automatically means more deaths occured due to the eruption(HINT: 36)
    • A. 

      True

    • B. 

      False

  • 7. 
    The following gases are emitted from a volcanic eruption EXCEPT for: (HINT:40)
    • A. 

      Water vapor

    • B. 

      Sulfur

    • C. 

      Flourine

    • D. 

      Hydrogen chloride

    • E. 

      Nitrogen

  • 8. 
    Acid rain  is rain that contains sulfuric acid. Acid rain damages plants on land and water (See picture). Emitted from a volcanic eruption & powerplants, sulfur combines with oxygen and __________ to create acid rain. (HINT:p.40)
    • A. 

      Hydrochloric acid

    • B. 

      Nitrogen

    • C. 

      Water vapor

    • D. 

      Carbon dioxide

  • 9. 
    How do volcanic eruptions impact climate? (HINT: p.40-41)
    • A. 

      Volcanic products (carbon dioxide, greenhouse gas) can warm the atmosphere and speed up global warming

    • B. 

      Volcanic products (dust, ash) can block the sunlight and reduce global temperatures

    • C. 

      Volcanic products (sulfur, water vapor) can generate more rain containing sulfuric acid

    • D. 

      Volcanic products (carbon dioxide) can acculumate near eruption sites and cause animals & people to suffocate

    • E. 

      All of the above

  • 10. 
    True or False: All volcanoes are monitored with seismographic equipment in order to detect signs of impending eruption. (HINT: 54) 
    • A. 

      True

    • B. 

      False

  • 11. 
    True or False: Monitoring a volcano can prevent an eruption.
    • A. 

      True

    • B. 

      False

  • 12. 
    What physical clues predict that the volcano is preparing to eventually erupt?
    • A. 

      The volcano would swell, or inflate or bulge

    • B. 

      The slope (or incline) of the volcano would steepen or increase

    • C. 

      Nothing

    • D. 

      Both A & B

  • 13. 
    What technological device can monitor the slope (or incline) of a volcano? (HINT: 56)
    • A. 

      Tiltmeter

    • B. 

      United States Geological Survey (USGS)

    • C. 

      Hawaiian Volcano Observatory (HVO)

  • 14. 
    True or False: Physical clues (tilt of the volcano, swelling, earthquake measurements) can definitely predict a volcanic eruption. (HINT:p.56)
    • A. 

      True

    • B. 

      False

  • 15. 
    True or False: In addition to the physical clues (bulge of land, tilt, earthquake measurements), long term study of the volcano behavior and past eruptions can help lead to a possible prediction of a volcanic eruption (HINT:56)
    • A. 

      True

    • B. 

      False