The rigid outer layer of the Earth is called the

The Earth’s lithosphere is broken into a number of large pieces known as

Earthquakes are primarily caused by

The point inside the Earth where an earthquake originates is called

The boundary where two tectonic plates move apart is known as

Which instrument records the intensity and duration of earthquakes?

The scale used to measure the magnitude of earthquakes is

The Pacific Ring of Fire is famous for its

Which type of seismic waves travel fastest?

Which of the following plates is moving the fastest?