Name: 

True/False  --- Indicate whether the statement is true or false.

Divergent fault boundaries are especially likely to cause earthquakes.

When the kinetic energy build up in a plate exceeds the strength of the rock an earthquake occurs.

The earthquake focus is the point below the surface of Earth where the rock breaks.

Secondary, or S-waves, are only able to travel through liquids inside Earth.

Seismic waves are recorded and measured by an instrument called a seismologist.

The Moment Magnitude scale rates the total energy released by an earthquake.

The Mercalli scale rates earthquakes according to the size of the seismic waves recorded on a seismograph.

The San Andreas fault is an active fault that causes many earthquakes to occur in the city of San Francisco, California.

Secondary, or S-waves cause the rock to move in a side-to-side motion, across the direction of the traveling wave.

An earthquake is a form of stick-slip motion.

Which type of plate boundary is most likely to cause earthquakes?

The energy of an earthquake is spread through Earth’s crust by:

The zone on the surface of Earth where the rocks rupture or break open due to an earthquake is called a(n):

____ is the polished surface of a rock, which is the effect of rock moving against rock along an above-ground fault.

The release of built-up ____ causes earthquakes.

The ____ is the location on Earth’s surface directly above the area where rock breaks in the crust in an earthquake.

Following an earthquake, small tremors known as ____ can occur, lasting for hours to days after the original quake.

What is one way for a fault to occur within a lithospheric plate instead of at its boundaries?

Although a plate may be moving as ____, its boundaries behave as though they were made of ____.

When a seismic wave reaches Earth’s surface it is known as a(n):

The diagram shows two different sections of a fault. Section A has an average of 4 earthquakes per year. Section B has an average of 1 earthquake every 12 years. Which section would have the stronger earthquakes?

Which of the following is NOT needed for stick-slip motion?

What information would be most useful in predicting the occurrence of an earthquake at a particular location?

The fastest type of seismic wave is known as a(n):

____ are scientists who record and interpret seismic waves.

____ are typically the slowest type of seismic wave, but they cause the most damage in an earthquake.

A ____ is an instrument that records and measures the intensity of seismic waves.

At least ____ seismic stations are needed to determine the epicenter of an earthquake.

The distance scale on a map is 1 cm = 10 km. The distance from a seismic station to the epicenter of an earthquake is 50 km. To locate the epicenter, what would be the radius of the circle that is drawn around this station on the map?

If P-waves travel at 7 km/s and S waves travel at 3.6 km/s, how many km/s faster are P-waves?

On the Richter Scale a magnitude 6 earthquake is how many times more powerful than a magnitude 3 earthquake?

The New Madrid Fault is a 250-mile long fault located in what part of the United States?

The ____ scale rates earthquakes according to the size of the seismic waves recorded on a seismograph.

Figure 9-1 shows an earthquake’s seismic waves traveling through the interior of Earth. The wave most likely to be an P-wave is:

Figure 9-1 shows the focus of an earthquake and how its seismic waves travel through the interior of Earth. The wave most likely to be an S-wave is:

Which of the following could you determine if you knew only the arrival times of P-waves and S-waves from one seismic station?

The ____ scale rates the total energy released by an earthquake.

Assume that P-waves travel through the Earth at 6 km/s. A seismic station records P and S wave arrival times and decides the difference between their arrival is 12 seconds. How far away was the earthquake’s epicenter?  (Note:  Use the formula in Figure 9-2 above [D = r * t] to figure out the answer.)

Assume that P-waves travel through the Earth at 6 km/s. A seismic station records P and S wave arrival times and decides the difference between their arrival is 65 seconds. How far away was the earthquake’s epicenter?  (Note:  Use the formula in Figure 9-2 above [D = r * t] to figure out the answer.)

Each category in the ____ scale is a rating of the damage suffered by building, ground, and people during an earthquake.

What is the term used to describe the process where water enters the spaces between dirt and sand particles in man-made land, and then the "soil" behaves like a liquid and will not support buildings?

Ocean waves that can travel thousands of miles from an underwater earthquake site are called ___________

In 132 AD Chinese philosopher Chang Heng created an instrument that would predict in which direction an earthquake had occured. The invention was called a ________________.

The resistance that results from the relative motion of two objects that rub against each other is called _______.

The time difference between the arrival of a P-wave and an S-wave at a seismic station is 30 seconds. How far away is the epicenter? (NOTE: Use the graph in Figure 9-3 to determine your answer.)

The time difference between the arrival of a P-wave and an S-wave at a seismic station is 60 seconds. How far away is the epicenter? (NOTE: Use the graph in Figure 9-3 to determine your answer.)

The proper human response to an approaching tsunami should be to.....

The proper human response to an earthquake should be to ....

You are a building inspector and have been asked about which building materials to include in a new commercial building. The most important construction material in the choices below is ......

The distance scale on a map is 1 centimeter = 25 kilometers. The distance from a seismic station to the epicenter of a recent earthquake is 100 kilometers. To locate the epicenter on a map, you would need to draw a circle around the seismic station that has a radius of .....

DRAWBACK  refers to what part of tsunami understanding?