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Plate Tectonics and Mid-Ocean Ridges

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Questions and Answers

What is the primary mechanism that creates new crust at mid-ocean ridges?

Erosion and deposition of sediments in the ocean basins

Volcanic activity pushing up from the mantle (correct)

Tectonic plates colliding and building up mountains

Tectonic plates sliding under each other in subduction zones

How fast are the tectonic plates moving apart at the mid-ocean ridge in the Atlantic Ocean?

About 2 to 5 feet per year

There is no movement, the plates are stationary

About 0.8 to 2 inches per year (correct)

About 1 to 2 meters per year

What is the process called when one tectonic plate slides under another?

Collision

Subduction (correct)

Divergence

Erosion

What major geological feature has been formed by the subduction of an oceanic plate under a continental plate along the western coast of South America?

The Andes Mountains Signup and view all the answers

How did the continents of North America and Europe, and South America and Africa, used to be connected?

They were part of a single supercontinent Signup and view all the answers

What is the primary driver behind the formation of mountain ranges like the Andes Mountains?

Tectonic plates colliding and the crust crumpling Signup and view all the answers

What happens when tectonic plates move apart at some boundaries?

Molten rock flows up from the mantle, creating new crust Signup and view all the answers

How far apart have the landmasses of North America and Europe moved due to plate separation?

A vast ocean Signup and view all the answers

What can happen when tectonic plates collide or crash into each other?

The crust is pushed higher, creating mountains Signup and view all the answers

What is the name of the process where a heavier oceanic plate slides under a lighter continental plate?

Subduction Signup and view all the answers

What geological feature has been created by the subduction process along the western coast of South America?

Both a deep ocean trench and the Andes Mountains Signup and view all the answers

What has been the primary driver behind the formation of mountain ranges throughout Earth's history?

Plate interactions like collision and subduction Signup and view all the answers