Seafloor Spreading and Plate Tectonics #2

Front

What causes Earth's tectonic plates to move?

Back

Convection currents in the mantle.

Front

Why does hot mantle rise?

Back

Hot mantle is less dense.

Front

What is formed when two ocean plates separate?

Back

Mid-ocean ridge.

Front

What type of boundary occurs when tectonic plates move apart?

Back

Divergent boundary.

Front

What is the theory that describes the movement of Earth's plates?

Back

Plate Tectonics.

Front

What is seafloor spreading?

Back

The process by which new oceanic crust is formed at mid-ocean ridges and older crust is pushed away.

Front

What is a convergent boundary?

Back

A boundary where two tectonic plates collide.

Front

What geological feature is formed at a convergent boundary?

Back

Trenches or mountain ranges.

Front

What is a transform boundary?

Back

A boundary where two tectonic plates slide past each other.

Front

What is the significance of the mid-ocean ridge?

Back

It is a divergent boundary where new oceanic crust is created.