Earthquakes and Tsunami Flashcard

Front

What is the Richter Scale?

Back

A logarithmic scale used to measure the magnitude of earthquakes.

Front

How much more energy does a magnitude 8 earthquake release compared to a magnitude 7 earthquake?

Back

A magnitude 8 earthquake releases 10 times more energy than a magnitude 7 earthquake.

Tags

NGSS.MS-PS3-5

Front

What type of seismic wave is the fastest?

Back

P (primary) waves are the fastest seismic waves.

Front

What type of seismic wave arrives at seismic stations second?

Back

S (secondary) waves arrive second.

Front

What is a tsunami?

Back

A series of ocean waves caused by underwater earthquakes or volcanic eruptions.

Tags

NGSS.MS-ESS3-2

Front

What instrument is used to detect and measure earthquakes?

Back

A seismograph is used to detect and measure earthquakes.

Front

What is the focus of an earthquake?

Back

The focus is the point below Earth's surface where rock breaks.

Tags

NGSS.MS-ESS3-2

Front

What is the epicenter of an earthquake?

Back

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

Tags

NGSS.MS-ESS3-2

Front

What are aftershocks?

Back

Aftershocks are smaller earthquakes that occur in the same area after a larger earthquake.

Tags

NGSS.MS-ESS3-2

Front

What is a fault?

Back

A fault is a fracture in the Earth's crust along which movement has occurred.