Causes and Measurement of Earthquakes

Front

Which of these factors is involved in earthquake formation?

Back

rocks breaking

Front

What happens when stress builds at faults?

Back

Rock can bend and break.

Front

Which statement describes the focus of an earthquake?

Back

It begins about 5 kilometers below Earth’s surface.

Front

Which phrase describes a feature of an earthquake’s epicenter?

Back

region directly above the focus

Front

How are S waves and P waves similar?

Back

They shake the ground.

Front

Which statement describes P waves?

Back

They move slower than S waves.

Front

Which statement describes S waves?

Back

They occur at Earth’s surface.

Front

Which statement describes surface waves?

Back

They are produced by P and S waves.

Front

Which statement describes the Mercalli scale?

Back

This scale rates an earthquake according to how much damage it causes.

Front

Which statement describes the Richter scale?

Back

It measures magnitude based on the size of seismic waves.