Volcanoes Quiz

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

• Magma
• Lava
• Ash
• Rock

How many volcanoes on Earth are considered active?

• 1,000
• 5,000
• 10,000
• 1,900

Which type of plate boundary is most likely to produce volcanic activity?

• Transform plate boundary
• Divergent plate boundary
• Convergent plate boundary
• Intraplate boundary

Which ocean is home to the Mid-Atlantic Ridge?

• Atlantic Ocean
• Pacific Ocean
• Indian Ocean
• Arctic Ocean

Which type of volcano is characterized by steep, conic peaks and layers of lava, volcanic ash, and fragmented rocks?

• Stratovolcano
• Shield volcano
• Pyroclastic cone
• Lava dome

Which type of eruption is the largest and releases materials at speeds of hundreds of meters per second?

• Hawaiian eruption
• Strombolian eruption
• Vulcanian eruption
• Plinian eruption

What is the most dangerous volcanic hazard caused by explosive eruptions?

• Volcanic gas
• Landslides
• Pyroclastic flows
• Volcanic ash

Which volcanic hazard can cause crop failure, animal death, and human illness?

• Volcanic gas
• Landslides
• Pyroclastic flows
• Volcanic ash

Which volcanic hazard can cause complete darkness and disrupt air traffic?

• Volcanic gas
• Landslides
• Pyroclastic flows
• Volcanic ash

What is the name of the volcanic eruption type characterized by short-lived outbursts of lava?

• Hawaiian eruption
• Strombolian eruption
• Vulcanian eruption
• Plinian eruption