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Internal Structure of the Earth: The Crust

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Internal Structure of the Earth: The Crust

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Questions and Answers

What is the characteristic of oceanic crust?

Low density and similar to granite in composition

Brittle and less ductile due to added heat

High density and identical to basalt in composition (correct)

Found only under continents

What is the Mohorovičić Discontinuity (Moho)?

A tool used to study seismic waves

A type of rock formation

A boundary between the crust and mantle (correct)

A type of earthquake wave

What is the approximate depth of the Moho under the oceans?

20 km

5 km (correct)

10 km

30 km

What is the approximate depth of the mantle?

2900 km Signup and view all the answers

How do we know most of what we know about the mantle?

Through seismic waves Signup and view all the answers

What is the composition of the Earth's core?

Primarily metallic iron, nickel, and oxygen Signup and view all the answers

What is the process responsible for the movement of tectonic plates?

Convection currents in the Earth's mantle Signup and view all the answers

What is the term used to describe the boundary between tectonic plates?

Fault Signup and view all the answers

What is the result of the movement of tectonic plates at fault lines?

Volcanic eruptions and earthquakes Signup and view all the answers

What is the pattern of earthquakes and volcanoes around the Pacific Ocean basin known as?

The ring of fire Signup and view all the answers