Understanding Volcanoes: Types and Eruptions

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

• Lava

• Crust

• Pumice

• Ash

What happens when a volcano is classified as extinct?

• It is under observation

• It has not erupted in historical times

• It will never erupt again

• It erupts infrequently

Which volcano is currently forming under the sea near Hawaii?

• Mauna Kea

• Loihi

• Mauna Loa

• Kilauea

What is the primary characteristic of a cinder cone volcano?

• Wide and flat

• Very tall and thin

• Small with steep sides

• Large, gentle slopes

What significant event occurred at Parícutin volcano in 1943?

• It became dormant

• It was declared extinct

• It erupted violently

• It first appeared

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

• Cinder cone

• Stratovolcano

• Lava dome

• Shield volcano

What are stratovolcanoes known for?

• Quiet lava flows

• Emitting minimal ash

• Explosive eruptions

• Producing large quantities of pumice

Which volcano had a major eruption in 1980?

• Mount Etna

• Mount Fuji

• Mount St. Helens

• Mount Pinatubo

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

• The Atlantic Ocean

• The Indian Ocean

• The Arctic Circle

• The Pacific Ocean

What potential threat lies beneath Yellowstone National Park?

• An earthquake zone

• A large aquifer

• A dormant volcano

• A supervolcano