Understanding Volcanoes: Types and Eruptions

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

• Soil

• Rock

• Lava

• Crust

What happens to a dormant volcano?

• It is erupting

• It has stopped erupting forever

• It never existed

• It might erupt again someday

Which volcano formed the islands of Hawaii?

• Parícutin

• Loihi

• Krakatoa

• Mount St. Helens

What is the main feature of cinder cone volcanoes?

• Underwater formations

• Liquid lava flows

• Large, gentle slopes

• Explosive eruptions with ash

Which type of volcano has steep, straight sides?

• Cinder cone volcano

• Complex volcano

• Shield volcano

• Stratovolcano

What type of volcano is characterized by gentle slopes that increase in steepness?

• Lava dome

• Stratovolcano

• Cinder cone volcano

• Shield volcano

What is the potential danger of stratovolcanoes?

• They can form new islands

• They are usually underwater

• They have highly explosive eruptions

• They are very small

What catastrophic event occurred at Mount St. Helens in 1980?

• A tsunami

• A volcanic eruption

• A landslide

• An earthquake

Where is the Ring of Fire located?

• Pacific Ocean

• Indian Ocean

• Arctic Ocean

• Atlantic Ocean

What is a supervolcano?

• A massive volcano with potential to cause global effects

• A dormant volcano

• A volcano on the moon

• A small underwater volcano