Earthquakes geofest5
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| How many types of waves do earthquakes produce? | 3
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| Which waves move out from the focus and move the fastest? | P-Primary Waves
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| Which type of wave can move only through solids? | S-Secondary Waves
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| P waves can move through _______ and ________. | solids and liquids
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| Push and pull rock creating a back-and-forth motion in the direction the wave is moving (longitudinal wave) | P-waves
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| What types of waves form when P and S waves reach the surface? · | Surface Waves
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| Which waves move out from the earthquake focus and move slower than primary waves? | S waves
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| __________ ___________ can cause the ground to shake making rock sway from side to side and roll like an ocean wave | surface waves
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| Which type of wave Move at right angles to primary waves causing rocks to move up and down and side to side (transverse wave) | s waves
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| Scientists use the principle that the speed and direction of a seismic wave depends on | the material it travels through.
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| Because of the behavior of these different waves, scientists have indirect evidence for ____________________. | the solid inner core and liquid outer core of Earth
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| because earthquake waves travel faster through the mantle than through the crust, scientists know that the | mantle is denser than the crust.
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| The movement of materials in the outer core of Earth is inferred to be the cause of Earth’s | magnetic field.
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| The epicenter is the point on Earth’s surface directly above _____________________________. | where the energy is released in an earthquake.
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| The energy spreads outward in all directions as vibrations called | seismic waves.
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| Seismic waves can be measured and recorded by a | seismograph.
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| The vibration record, called a _______, looks like jagged lines on paper. | seismogram
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| Measuring the time between the arrival of the P and S waves determines ___________________. | the distance between the recording seismograph and the earthquake epicenter.
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| _____________ identifies the epicenter of an earthquake. The location of an earthquake’s epicenter is found by plotting circles on a map from the records of three seismograph stations and finding the point where the three circles intersect. | Triangulation
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Created by:
dalmueller