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Earth's Crust and Plate Tectonics

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Questions and Answers

What is the main characteristic of rocks that form the oceanic crust?

Medium density

Low density

High density (correct)

Variable density

What happens to the rock in the mantle due to intense pressure and heat?

It softens and partially melts (correct)

It becomes solid and rigid

It remains unchanged

It becomes denser and heavier

What is the result of the movement of the two plates away from each other at a divergent plate boundary?

The formation of new oceanic crust (correct)

The formation of a subduction zone

The formation of a transform fault

The formation of a convergent boundary

What is the term for the process of hot material rising from the mantle to the surface and causing the tectonic plates to split?

Convection currents Signup and view all the answers

What is the feature that forms as a result of the formation of new oceanic crust at a divergent plate boundary?

Mid-oceanic ridge Signup and view all the answers

What occurs when two tectonic plates are moving towards each other?

Convergent boundary Signup and view all the answers

What is the process called when a denser oceanic plate sinks beneath another plate?

Subduction Signup and view all the answers

What is the term for the area where the Pacific Ocean plate is being subducted beneath the North American plate?

Ring of Fire Signup and view all the answers

What is the result of the sinking oceanic plate being destroyed?

Volcanic activity Signup and view all the answers

What is the term for the boundaries where tectonic plates move horizontally past each other?

Transfer boundaries Signup and view all the answers