Earthquakes!

Front

What is an aftershock?

Back

A smaller earthquake that follows a larger earthquake.

Front

True or False: Earthquakes happen every day, but most are too small for humans to notice.

Back

True

Front

What does it mean if an earthquake scored high on the Richter scale but low on the Mercalli scale?

Back

It probably happened in an area with no people.

Front

How many seismograph stations are needed to locate an earthquake epicenter?

Back

At least 3.

Front

What is a seismograph?

Back

A device that measures and records the motion of the ground during an earthquake.

Front

What is a seismogram?

Back

A tracing of an earthquake's motion created by a seismometer.

Front

What is the Richter scale?

Back

A scale that measures the magnitude of an earthquake.

Front

What is the Mercalli scale?

Back

A scale that measures the intensity of an earthquake based on its effects.

Front

What is liquefaction?

Back

A phenomenon where saturated soil loses strength and behaves like a liquid during an earthquake.

Front

What is the epicenter of an earthquake?

Back

The point on the Earth's surface directly above where the earthquake originates.