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Geology and Earthquake Hazards

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Questions and Answers

What is the composition of the asthenosphere?

Completely solid
50% solid and 50% liquid
1-5% liquid and 95-99% solid (correct)
1-5% solid and 95-99% liquid

What is the main driving force behind the movement of tectonic plates?

Convection cells in the mantle (correct)
Magnetic forces in the Earth's core
Convection cells in the lithosphere
Gravity pulling the plates towards the center of the Earth

What is the temperature range at the base of the lithosphere-asthenosphere boundary?

Melting temperature of the mantle (correct)
Room temperature
Freezing temperature of the mantle
Absolute zero

What happens to the hot material when it reaches the base of the lithosphere?

It cools and sinks back down through the mantle (B) Signup and view all the answers

What is the result of the movement of the hot material in the mantle?

The formation of a convection cell (B) Signup and view all the answers

What is the characteristic of the rest of the mantle below the asthenosphere?

It is completely solid (B) Signup and view all the answers

What is the rate at which tectonic plates move?

Slow and steady (C) Signup and view all the answers

What is the main factor that allows the asthenosphere to flow?

High temperature (A) Signup and view all the answers

What is the term for the process of hot material rising and cool material sinking in the mantle?

Mantle convection (C) Signup and view all the answers

What is the result of the confining pressure in the mantle?

The formation of a solid mantle (D) Signup and view all the answers