Subduction

The video explains the interaction between tectonic plates, focusing on the collision between continental and oceanic plates. It describes the subduction process where the denser oceanic plate is pushed under the continental plate, leading to deformation and slow descent towards the mantle. This process often results in the formation of deep ocean trenches, such as the Marianas Trench, which is the deepest in the world.

What typically happens when a continental plate meets an oceanic plate?

• The oceanic plate slides over the continental plate.

• Both plates move away from each other.

• The continental plate is pushed under the oceanic plate.

• The oceanic plate is pushed under the continental plate.

At what rate does the oceanic plate typically descend towards the mantle?

• Several kilometers per year

• Several meters per year

• A few centimeters per year

• A few millimeters per year

What geological feature is often formed due to the subduction of an oceanic plate?

• Rift valleys

• Deep ocean trenches

• Volcanic islands

• Mountain ranges

Which of the following is an example of a deep ocean trench formed by plate subduction?

• The Andes

• The Great Rift Valley

• The Marianas Trench

• The Himalayas

What is the primary cause of the formation of the world's deepest ocean trench?

• Subduction of an oceanic plate

• Tectonic uplift

• Erosion by ocean currents

• Volcanic activity