Plate Tectonics and Volcano Formation

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What is the primary cause of the formation of volcanoes in the Pacific Ring of Fire?

The collision of tectonic plates

The transform motion of tectonic plates

The convergent motion of tectonic plates (correct)

The divergent motion of tectonic plates

What percentage of the world's active and dormant volcanoes are found in the Pacific Ring of Fire?

60% (correct)

70%

40%

50%

What is the name of the process that forms volcanoes when an oceanic plate is pushed beneath a continental plate?

Continental drift

Plate tectonics

Subduction (correct)

Sea-floor spreading

What is the name of the largest volcano in the world?

Mauna Loa Signup and view all the answers

What is the term for the small volcanoes that form around a main volcano?

Parasitic cones Signup and view all the answers

How many active volcanoes are found in the Philippines?

24 Signup and view all the answers

What is the primary reason for magma to rise in a volcanic eruption?

The expansion of dissolved gases in the magma Signup and view all the answers

What type of volcanic arc is formed when an oceanic plate meets a continental plate?

Andean/Volcanic arc Signup and view all the answers

What is the term for the column of magma in the mantle that rises to the surface, forming a volcano?

Mantle plume Signup and view all the answers

What is the term for the large depression formed when a volcano erupts and collapses?

Caldera Signup and view all the answers

What is the relationship between silica content and viscosity in magma?

Viscosity is directly proportional to silica content Signup and view all the answers

What type of volcano is characterized by a near-perfect cone shape?

Strato volcano Signup and view all the answers

What type of volcanic activity is characterized by the movement of tectonic plates away from each other?

Divergent Signup and view all the answers

What is the deadliest component of a volcanic eruption?

Pyroclastic flows Signup and view all the answers

What is the term for the underground tube-like structure that connects the magma chamber to the main vent?

Conduit Signup and view all the answers

What is the name of the famous volcano in Hawaii with a lava dome shape?

Hualalai Signup and view all the answers

What is the process that occurs as magma rises, resulting in eruptions?

The dissolved gases expand and form bubbles Signup and view all the answers

What type of volcanic material is characterized by a glass-like surface?

Obsidian Signup and view all the answers