Exploring Volcanoes: Types and Eruptions

What is magma called when it reaches the Earth's surface?

• Rock

• Ash

• Crust

• Lava

What happens when a volcano is dormant?

• It is erupting

• It is extinct

• It may erupt again someday

• It has never erupted

What type of volcano is characterized by gentle slopes and liquid lava flows?

• Lava dome

• Stratovolcano

• Cinder cone volcano

• Shield volcano

Which volcano formed right in front of Senior Pulido's eyes?

• Loihi

• Mount St. Helens

• Krakatoa

• Parícutin

Which of the following is not a type of volcano?

• Cinder cone volcano

• Crystal volcano

• Shield volcano

• Stratovolcano

What makes stratovolcanoes particularly dangerous?

• Gentle eruptions

• Slow lava flow

• They are underwater

• Violent eruptions with ash and toxic gases

Which volcano's eruption in 1980 is known as the most destructive in US history?

• Mount Fuji

• Mount St. Helens

• Mount Pinatubo

• Mount Vesuvius

How many potentially active volcanoes are there in the world?

• More than 3000

• Over 2000

• Nearly 1500

• About 500

What area is known as the 'Ring of Fire'?

• The Arctic Ocean

• The Indian Ocean

• The Pacific Ocean

• The Atlantic Ocean

What lies beneath Yellowstone National Park?

• Chambers of molten magma

• A dormant volcano

• A stratovolcano

• A shield volcano