Yellowstone and Mount St. Helens Eruptions

The video discusses the 1980 eruption of Mount St. Helens, the deadliest volcanic event in US history, and introduces Yellowstone as a supervolcano with the potential for even greater devastation. It explains the criteria for supervolcanoes, signs of activity in Yellowstone, and the unique caldera structure of the park. The video highlights the potential impact of a future eruption and the geological features of Yellowstone.

What was the magnitude of the earthquake that triggered the Mount St. Helens eruption?

• 6.0

• 5.1

• 7.2

• 4.5

How many people were killed in the Mount St. Helens eruption?

• 23

• 57

• 150

• 100

What defines a super eruption according to scientists?

• An eruption that lasts more than a week

• An eruption with a magnitude of 6.0 or higher

• An eruption that causes global climate change

• An eruption with more than 240 cubic miles of material

How many super eruptions have occurred at Yellowstone in the past 2.1 million years?

• Three

• Two

• One

• Four

What unusual event occurred in Yellowstone in 2004 involving bison?

• Bison were found dead in a geyser basin

• Bison migrated out of the park

• Bison were found in a new area of the park

• Bison were seen near the caldera

What gases were identified as causing the death of the bison in Yellowstone?

• Hydrogen sulfide and carbon dioxide

• Methane and oxygen

• Nitrogen and helium

• Sulfur dioxide and argon

What is the shape of the Yellowstone supervolcano?

• A flat plateau

• A large caldera

• Cone-shaped with a crater at the top

• A series of small hills

How many times has Yellowstone erupted since its last super eruption?

• 30 times

• 10 times

• 15 times

• 25 times

How does the size of smaller eruptions at Yellowstone compare to Mount St. Helens?

• They are about the same size

• They are twice as big

• They are 50 times as big

• They are 100 times as big

What is the potential impact of a future Yellowstone super eruption?

• It would be similar to a regular volcanic eruption

• It would have no significant impact

• It would only affect the immediate area

• It could be the largest natural disaster in recorded history