Plate Boundaries Review

Front

What is a subduction zone?

Back

A subduction zone is formed when one tectonic plate sinks below another.

Front

How do ocean trenches form?

Back

Ocean trenches form when two oceanic plates collide and the older, denser plate sinks under the younger, less dense plate.

Front

What happens at a convergent boundary?

Back

At a convergent boundary, tectonic plates move toward each other, causing subduction.

Front

Where is new ocean crust formed?

Back

New ocean crust is formed at divergent boundaries.

Front

What is a rift valley?

Back

A rift valley is a lowland region formed by the divergence of tectonic plates.

Front

What are the three types of plate boundaries?

Back

The three types of plate boundaries are divergent, convergent, and transform boundaries.

Front

What occurs at divergent boundaries?

Back

At divergent boundaries, tectonic plates spread apart, allowing magma to rise and create new crust.

Front

What is the significance of the Mariana Trench?

Back

The Mariana Trench is the deepest sea floor in the world, formed by the subduction of the Pacific Plate beneath the Eurasian Plate.

Front

What is a transform boundary?

Back

A transform boundary is where two tectonic plates slide past each other, often causing earthquakes.

Front

What is the role of gravity in plate tectonics?

Back

Gravity causes the denser tectonic plates to sink beneath lighter plates at subduction zones.