Earthquakes and Faults

Front

What is the force that acts on rock to change its shape or volume?

Back

Stress is the force that acts on rock to change its shape or volume.

Front

Which stress force pulls on the Earth's crust and causes rock to thin in the middle?

Back

Tension is the stress force that pulls on the Earth's crust and causes rock to thin in the middle.

Front

Which seismic waves compress and expand the ground like an accordion, traveling faster than other waves?

Back

P waves are seismic waves that compress and expand the ground like an accordion, traveling faster than other waves.

Front

What type of fault occurs where the rocks on either side slip past each other sideways, with little up or down motion?

Back

A strike-slip fault occurs where the rocks on either side slip past each other sideways, with little up or down motion.

Front

Which fault has the same structure as a normal fault, but the blocks move in the opposite direction?

Back

A reverse fault has the same structure as a normal fault, but the blocks move in the opposite direction.

Front

What is the definition of an earthquake?

Back

An earthquake is the shaking of the Earth's surface caused by the sudden release of energy in the Earth's lithosphere.

Front

What is the focus of an earthquake?

Back

The focus of an earthquake is the point within the Earth where the earthquake originates.

Front

What is the epicenter of an earthquake?

Back

The epicenter is the point on the Earth's surface directly above the focus of an earthquake.

Front

What are seismic waves?

Back

Seismic waves are waves of energy that travel through the Earth, produced by earthquakes or other geological activity.

Front

What is a normal fault?

Back

A normal fault is a type of fault where the rocks above the fault plane move downward relative to the rocks below.