Chapter 11

Question 0

In regions lacking modern engineering standards, the greatest hazard during an earthquake is:

Answer 0

Building collapse

Question 1

Earthquake risk has increased in recent decades because:

Answer 1

Because the human population has expanded.

Question 2

Earthquake hazards include:

Answer 2

All of the above

Question 3

What is an earthquake?

Answer 3

Sudden rapid shaking of the Earth’s crust.

Question 4

The elastic rebound theory is?

Answer 4

A theory describing the behavior of faulting crust.

Question 5

Earthquakes at divergent margins tend to be:

Answer 5

Produced by normal faulting

Question 6

Examples of US intraplate seismicity include:

Answer 6

Charleston

Question 7

Seismicity at divergent, convergent, and transverse plate boundaries is caused by the following stresses (in correct order):

Answer 7

Tensional, compressional, and shearing.

Question 8

Finding an epicenter requires:

Answer 8

Triangulation

Question 9

The first seismic wave recorded on a seismogram is the:

Answer 9

P wave

Question 10

Earthquake magnitude is measured by:

Answer 10

The Richter Scale

Question 11

Seismic shadow zones are the result of:

Answer 11

Wave refraction at discontinuities and absorption in the outer core.

Question 12

Seismic discontinuities are found at the following depths:

Answer 12

8km to 20-70 km, 100 km, 400 km, 660 km, 4800 km, 2,900 km.

Question 13

Seismic topography reveals that Earth’s interior is:

Answer 13

Highly complex with hot regions and cool regions.