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Volcanoes and Types Quiz

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Questions and Answers

What is the definition of an active volcano?

A volcano that is considered dormant

A volcano that has erupted at least once in the past 10,000 years (correct)

A volcano that has not erupted in the past 10,000 years

A volcano that is currently erupting

What is the difference between an active volcano and a dormant volcano?

Dormant volcanoes are not expected to erupt again, while active volcanoes are expected to erupt again in the future

Active volcanoes have not erupted in the past 10,000 years, while dormant volcanoes have erupted in the past 10,000 years

There is no difference between active and dormant volcanoes

Active volcanoes are currently erupting, while dormant volcanoes are not currently erupting but may erupt again (correct)

What are the main factors that affect the viscosity of magma?

The type of rock the magma is moving through, and the speed of the eruption

Temperature, chemical composition, and the amount of dissolved gases (correct)

Depth, pressure, and the age of the volcano

The size of the volcano, and the type of eruption

What are some of the key signs that a volcano may be entering a more active phase, according to PHIVOLCS?

Increased seismic activity, changes in steam emissions, and crater glow Signup and view all the answers

Which of the following best describes an inactive volcano?

A volcano that has not erupted in over 10,000 years and is not expected to erupt again Signup and view all the answers

What is the highest volcano alert level, according to the information provided?

Alert Level 5 Signup and view all the answers

What is the funnel-shaped depression at the top of a volcano called?

Crater Signup and view all the answers

Which type of volcano is formed by the accumulation of lava flows?

Shield Volcano Signup and view all the answers

What is the term for molten rock inside the Earth?

Magma Signup and view all the answers

Which type of volcano is known for its large, nearly perfect sloped structure?

Composite Volcano Signup and view all the answers

Which type of volcanic eruption is characterized by a violent eruption due to the contact between water and magma?

Phreatomagmatic Signup and view all the answers

Which region is the Philippines situated in, known for its high volcanic activity?

Pacific Ring of Fire Signup and view all the answers