Plate Tectonics and Volcanic Activity Quiz

What is the molten rock called when it is beneath the surface of the Earth?

• Magma

• Lava

• Ash

• Solid rock

How many volcanoes on Earth are considered active?

• 2,500

• 500

• 1,000

• 1,900

At which type of plate boundaries are volcanoes most common?

• Convergent plate boundaries

• Collision plate boundaries

• Transform plate boundaries

• Divergent plate boundaries

Which ocean is home to a divergent plate boundary known as the Mid-Atlantic Ridge?

• Pacific Ocean

• Indian Ocean

• Atlantic Ocean

• Arctic Ocean

Which type of volcano is known for its steep, conic peaks and alternating lava eruptions and debris eruptions?

• Lava dome

• Stratovolcano

• Pyroclastic cone

• Shield volcano

What type of volcanic feature is created when a volcano releases most of the material in its magma chamber, causing the land around the erupting vent to collapse inwardly?

• Lava dome

• Pyroclastic cone

• Caldera

• Crater

Which volcanic chain of islands has been forming for at least 70 million years over a hot spot underneath the Pacific plate?

• Hawaiian Islands

• Canary Islands

• Aleutian Islands

• Galapagos Islands

What is the name of the volcano that was the first to be studied for its entire life cycle, emerging from a cornfield in 1943?

• Mount Pelée

• Mount Rainier

• Parícutin

• Mauna Loa