Vocabulary: body wave, earthquake, epicenter, fault, focus, P-wave, S-wave, seismic wave, seismogram, seismograph Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Have you ever experien ... ced an earthquake? yes If so, what did it feel like? Everything shaking and kind of bouncing Earthquakes are usually caused by the sudden movement of rocks along a fault, or fracture, in Earth’s crust. The most famous fault in the U.S. is the San Andreas Fault in California. What major cities are located near the San Andreas Fault? Los Angeles, San Francisco, fault Gizmo Warm-up The Earthquakes 1 – Recording Station Gizmo™ simulates the seismic waves released by an earthquake. To begin, look at the key on the bottom left side of the Gizmo. The epicenter of the earthquake is the point on Earth’s surface closest to the focus, or origin, of the earthquake. What symbol represents the epicenter? It looks like a compass What symbol represents the recording station? A little triangle Click Play ( ) and observe the seismic waves leaving the epicenter of the earthquake [Show More]
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