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Everyday Science: Volcano Quiz
by Staff
Fiery explosions, boiling lava, hot ash spewing everywhere -- total disaster is probably the first thing that comes to mind when you think "volcano." And, yes, that is certainly a possibility. But do you know what’s really going on when a volcano erupts?

How many volcanoes are erupting around the world on any given day?

  • 10
  • 100
  • 500

About how many volcanoes erupt every year around the world?

  • 10
  • 60
  • 90

Mount Etna in Sicily, Italy, has been erupting regularly for longer than any other volcano in the world. How many years has it been?

  • 750
  • 1,200
  • 3,500

What was the largest volcanic eruption (in terms of lava emissions) in modern times?

  • Kilauea (Hawaii)
  • Mount St. Helens (Oregon)
  • Mount Tambora (Indonesia)

What's the largest volcano in the world?

  • Sakurajima, Japan
  • Mauna Loa, Hawaii
  • Vesuvius, Sicily

When Mount St. Helens erupted in 1980, it was the first volcanic eruption on the United States mainland since 1915. Which volcano erupted in 1915?

  • Lassen Peak (California)
  • Mount St. Helens (Washington)
  • Mount Rainier (Washington)

What's the difference between a Hawaiian and a Strombolian eruption?

  • Hawaiian: slow lava flows; Strombolian: explosive eruption
  • Hawaiian: eruption from vent on top; Strombolian: from fissures on sides
  • Hawaiian: pineapple; Strombolian: pepperoni

A volcano is considered extinct when it hasn't erupted in _____ years.

  • 500
  • 1,000
  • 10,000

What's the only active volcano on the European mainland?

  • the Matterhorn
  • Mount Etna
  • Mount Vesuvius

How fast can volcanic ash move through the air?

  • 25 mph (200 kph)
  • 125 mph (201 kph)
  • 200 mph (322 kph)