Volcano

What is a volcano?

• A volcano is a type of cloud formation
• A volcano is a type of rock found in the ocean
• A volcano is a type of bird known for its colorful feathers
• A geological formation that erupts hot lava

Which part of a volcano allows lava, gas, and ash to escape?

• pipe
• vent
• fissure
• crater

What causes a volcano to erupt?

• Pressure from underground gases

• Heavy rainfall

• Strong winds

• Earthquakes

How are volcanic eruptions classified?

• By the color of the lava

• By the size of the volcano

• By the frequency of eruptions

• By the type of eruption

What is the name for a volcano that has not erupted in a long time but is still considered active?

• Dormant volcano

• Extinct volcano

• Active volcano

• Supervolcano

What is a dormant volcano?

• A dormant volcano is a volcano that is constantly erupting.
• A dormant volcano is a volcano that has never erupted before.
• A dormant volcano is currently inactive but has the potential to erupt again in the future.
• A dormant volcano is a volcano that has been extinct for millions of years.

Which type of volcano is considered to be "asleep"?

• Erupting
• Dormant
• Active
• Extinct

An extinct volcano is one that…

• is currently erupting
• has never erupted before
• is no longer active and has not erupted in a long time
• is located in a densely populated area

Which of the following is NOT a characteristic of an active volcano?

• Does not erupt frequently
• Erupts frequently
• Remains dormant for long periods
• Has a low elevation

What are pyroclastic flows?

• Slow-moving currents of cold gas and volcanic matter during a volcanic eruption.
• Solidified lava flows after a volcanic eruption.
• Underwater volcanic eruptions.
• Fast-moving currents of hot gas and volcanic matter during a volcanic eruption.