Earth Space Science Chapter 8 Test Review

Front

What is a foreshock?

Back

A foreshock is a smaller earthquake that occurs before a larger earthquake, indicating that a major seismic event may follow.

Front

What instrument is used to detect and record seismic waves?

Back

A seismograph is an instrument that detects and records the waves produced by earthquakes, measuring their magnitude.

Front

What does it mean when faults move slowly?

Back

When faults move slowly, it is referred to as fault creep, which can occur without causing significant earthquakes.

Front

What is a time-travel graph used for in seismology?

Back

A time-travel graph is used to determine the distance to the epicenter of an earthquake based on the arrival times of seismic waves.

Front

How do you locate an earthquake's epicenter using circles on a map?

Back

The intersection of three circles drawn around seismic stations indicates the location of an earthquake's epicenter.

Front

What is the difference between a foreshock and an aftershock?

Back

A foreshock occurs before the main earthquake, while an aftershock occurs after the main earthquake as the crust adjusts.

Front

What are seismic waves?

Back

Seismic waves are energy waves that travel through the Earth, generated by the sudden release of energy during an earthquake.

Front

What are the two main types of seismic waves?

Back

The two main types of seismic waves are body waves (P-waves and S-waves) and surface waves.

Front

What is the Richter scale?

Back

The Richter scale is a logarithmic scale used to measure the magnitude of earthquakes based on the amplitude of seismic waves.

Front

What is the moment magnitude scale?

Back

The moment magnitude scale is a more modern scale that measures the total energy released by an earthquake, providing a more accurate assessment than the Richter scale.