Name of the last supercontinent.

The boundary created when two plate move towards each other.

The process in which one plate is pushed under another plate.

A string of volcanic islands created near a trench in the ocean.

The theory that states that plates were continental crust and plowed through ocean floor.

The study of the earth’s geological past relative to its magnetic field.

The space between two plates when they move apart.

The area where one plate is pulled beneath another.

The boundary created when two plates slide past one another.

The deep feature created where subduction is occurring.

The boundary created when two plates move away from each other.

A rigid piece of the crust and upper, upper mantle.

The seismic wave that is recorded second by the seismograph.

The theory that states that plates are made up of continental and oceanic crust and move by convection currents in the asthenosphere.

The rigid layer of the earth that includes the crust and the solid portion of the outer mantle.

Deformation of the earth’s crust.

An underwater volcanic cone with an eroded peak.

These waves include primary and secondary waves.

The concept that the thickness of the earth’s crust is constantly changing in an attempt to keep the thickness equal.

An underwater volcanic cone with its peak still intact.

The fastest moving seismic wave.

The portion of the earth’s crust that is like silly putty.

Shock waves or vibrations created by an earthquake.

The seismic wave that travels along the earth’s surface.