Chapter 8 Earthquakes and Earth Structures Review

Front

What is the Mohorovicic Discontinuity?

Back

The boundary between the crust and the mantle, identified by a change in the velocity of seismic waves.

Front

What are S waves?

Back

Shear waves that vibrate perpendicular to the direction they travel, caused by shearing motion in rock.

Front

What is the Inner Core?

Back

The innermost layer of the Earth, composed primarily of iron and nickel, and is solid due to immense pressure.

Front

What is fault creep?

Back

A phenomenon where rocks along a fault line slip slowly past each other at a continuous, slow rate.

Front

What happens to saturated soils during an earthquake?

Back

The soil can flow like a fluid due to the shaking.

Front

What are seismic waves?

Back

Waves of energy that travel through the Earth, generated by earthquakes or other geological activity.

Front

What is the difference between P waves and S waves?

Back

P waves are primary waves that compress and expand the material they travel through, while S waves are secondary waves that shear the material.

Front

What is liquefaction?

Back

A process during an earthquake where saturated soil loses its strength and behaves like a liquid.

Front

What is a fault line?

Back

A fracture in the Earth's crust where blocks of land have moved past each other.

Front

What is a seismic hazard?

Back

The potential for damage or injury caused by seismic activity, such as earthquakes.