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Tectonic Plate Movements and Volcanic Formation

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Tectonic Plate Movements and Volcanic Formation

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Questions and Answers

What is the main factor that determines the type of volcanic eruption?

Convection currents in the mantle

Pressure decrease

Silica content and viscosity (correct)

Dissolved gases

What is the characteristic of a lava that cools down quickly and forms a glass-like surface?

Pumice

Pyroclastic flow

Obsidian (correct)

Volcanic block

What is the shape of Mayon volcano?

Shield

Lava dome

Strato (correct)

Cinder cone

What is the relationship between viscosity and silica content?

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

What happens to the pressure as magma rises?

Pressure decreases Signup and view all the answers

What is the deadliest component of a volcano?

Pyroclastic flow Signup and view all the answers

What is the characteristic of a volcanic material that forms when lava cools down quickly and creates holes and a rough surface?

Pumice Signup and view all the answers

What is the composition of magma?

Silica content and water Signup and view all the answers

What is the shape of Taal volcano?

Complex Signup and view all the answers

What is the process that drives plate tectonics in the Earth's mantle?

Convection currents Signup and view all the answers