Mount St. Helens Quiz

What was the original height of Mount St. Helens before the 1980 eruption?

• Over 700 miles

• 8,363 feet

• 9,677 feet

• It is not mentioned

What do Native Americans call Mount St. Helens?

• Lava mountain

• Lawetlat'la

• Smoking mountain

• Volcanic mountain

How far does the Cascade Volcanic Arc span?

• Over 700 miles

• 8,363 feet

• 9,677 feet

• It is not mentioned

What type of eruption occurred at Mount St. Helens in 1980?

• A volcanic eruption

• A lateral eruption

• A smoking mountain eruption

• A deadly eruption

Why was Mount St. Helens named "smoking mountain"?

• Because it had many small eruptions

• Because it is a volcano

• Because it is part of the Cascade Volcanic Arc

• Because it was named after a British explorer

Which statement is true about the volcanic eruptions of Mount St. Helens before 1980?

• They were all deadlier than the 1980 eruption

• They were all smaller than the 1980 eruption

• They were all as strong as the 1980 eruption

• None of them were as deadly as the 1980 eruption

What caused the explosion of Mount St. Helens on May 18, 1980?

• A) A meteorite impact

• B) An earthquake

• C) A volcanic eruption from the top

• D) A landslide

What are pyroclastic flows?

• A) Slow-moving lava flows

• B) Thick waves of hot air, lava, and ash

• C) Cold air currents around a volcano

• D) Water streams created by a volcanic eruption

What was the estimated cost of the damages caused by the eruption of Mount St. Helens?

• A) Over $100 million

• B) Over $500 million

• C) Over $1 billion

• D) Over $2 billion

How many people died as a result of the Mount St. Helens eruption in 1980?

• A) 57

• B) 157

• C) 257

• D) 357