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Seismic Activity and Plate Tectonics

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Questions and Answers

What causes earthquakes to occur at fault lines?

The rotation of the Earth's crust

The movement of plates meeting at fault lines (correct)

The collision of asteroids

The pressure applied to the Earth's surface

How are earthquakes measured?

Using a seismograph that records ground-shaking activity (correct)

Using a telescope to observe underground movements

Using a thermometer to measure temperature changes

Using radar to detect seismic waves

What is the purpose of a seismometer?

To detect changes in atmospheric pressure

To measure the speed of seismic waves

To study the rotation of the Earth's core

To measure ground-shaking activity caused by earthquakes (correct)

Why is seismic activity important for scientists?

It allows scientists to study the type, size, and frequency of earthquakes Signup and view all the answers

How are earthquakes caused by the movement of plates?

The plates can rub against each other, press against each other, or slide over or under each other Signup and view all the answers

What is the main purpose of a seismometer?

To detect and record seismic waves Signup and view all the answers

Which type of seismic waves travel through the Earth's interior and not along its surface?

P-waves (primary waves) Signup and view all the answers

What is the major characteristic of S-waves (secondary waves)?

They only travel through solid materials Signup and view all the answers

What is the primary purpose of the Richter Scale?

To categorize earthquakes based on their energy production Signup and view all the answers

What makes the moment magnitude scale (MMO) a preferred way to measure earthquakes over the Richter scale?

It measures seismic movement rather than wave amplitude Signup and view all the answers