Unit B, Ch. 3: Shake, Rattle, and Roll

The amount of energy released by an earthquake is called its _________.

• focus

• magnitude

• tsunami

• epicenter

What is the point at which an earthquake begins?

• focus

• epicenter

• P wave

• magnitude

A break in rocks along which the rocks have moved is called a(n) _________.

• fault

• plate

• focus

• earthquake

What is a vibration of Earth caused by the release of energy that has been stored in Earth's rocks as they have ground past one another over time?

• fault

• S wave

• earthquake

• epicenter

A seismic sea wave that forms when an earthquake occurs on the ocean floor is called a ________.

• tidal wave

• focus

• P wave

• tsunami

What is a shock that occurs after the principle shock of an earthquake?

• tsunami

• L wave

• epicenter

• aftershock

What instrument can record earthquake waves?

• telegraph

• pendulum

• seismograph

• conventional foundation

The point on Earth's surface directly above the focus is called the _______.

• fault

• epicenter

• magnitude

• spring scale

What city on the San Andreas Fault was struck by a terrible earthquake in 1906?

• Honolulu, Hawaii

• San Francisco, California

• Anchorage, Alaska

• Los Angeles, California

What scale describes the magnitude of an earthquake?

• a spring scale

• a metric scale

• A Richter scala

• a Mohs' scale