Earthquake Waves
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Questions and Answers

Which type of earthquake wave travels exclusively through solid material?

  • Surface waves
  • All body waves
  • Secondary waves (S-waves) (correct)
  • Primary waves (P-waves)

What is the primary reason that surface waves are considered the most damaging during an earthquake?

  • They are generated at the focus of the earthquake.
  • They have the highest velocity among all earthquake waves.
  • They can travel through all mediums: solid, liquid and gas.
  • Their vibration direction is perpendicular to their propagation along the surface. (correct)

The point on the Earth's surface that experiences seismic waves first is known as the:

  • Focal point
  • Fault line
  • Epicenter (correct)
  • Shadow zone

What term describes the location within the Earth where the energy is released during an earthquake?

<p>Focus (Hypocenter) (A)</p> Signup and view all the answers

Which statement accurately describes the propagation of P-waves?

<p>They move longitudinally, with vibration parallel to the direction of propagation. (A)</p> Signup and view all the answers

What is the direct cause of the formation of earthquake waves?

<p>Release of energy along a fault (B)</p> Signup and view all the answers

How does the behavior of S-waves provide evidence about the Earth’s interior?

<p>Their shadow zone indicates a liquid outer core that they cannot penetrate. (D)</p> Signup and view all the answers

If an earthquake occurs, and a seismograph station records P-waves but no S-waves, what can be inferred about the region between the earthquake and the station?

<p>The region contains a liquid layer. (C)</p> Signup and view all the answers

Flashcards

Earthquake

Shaking of the earth caused by a release of energy, generating waves.

Fault

A sharp break in crustal rocks where energy is released during an earthquake.

Focus (Hypocenter)

The subsurface point where energy is released during an earthquake.

Epicenter

The point on Earth's surface directly above the focus; experiences waves first.

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Earthquake Waves

Waves of energy that travel through the Earth, caused by an earthquake.

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Body Waves

Earthquake waves that travel through Earth's interior.

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Primary Waves (P-waves)

Fastest body waves; move longitudinally and can travel through solids, liquids, and gases.

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Secondary Waves (S-waves)

Body waves that travel only through solids; slower than P-waves.

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