Earth's Structures UNIT 3 Test Review

Front

What causes geological features in a mid-ocean ridge?

Back

Rising convection currents in the mantle.

Front

What evidence supports the theory of plate tectonics?

Back

Similar rock formations found on different continents.

Front

Why does the oceanic crust sink beneath the continental crust at a subduction boundary?

Back

The oceanic crust is denser.

Front

What geological process forms volcanic island arcs?

Back

Subduction of an oceanic plate beneath another oceanic plate.

Front

How would you best describe plate tectonics?

Back

A scientific theory.

Front

What is the lithosphere?

Back

The rigid outer layer of the Earth, consisting of the crust and upper mantle.

Front

What is subduction?

Back

The process where one tectonic plate moves under another and sinks into the mantle.

Front

What is a mid-ocean ridge?

Back

An underwater mountain range formed by plate tectonics.

Front

What is the difference between oceanic and continental crust?

Back

Oceanic crust is denser and thinner than continental crust.

Front

What is seafloor spreading?

Back

The process by which new oceanic crust is formed at mid-ocean ridges.