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Ch. 8 Vocabulary
Ch. 8 Vocabularyy
Question | Answer |
---|---|
Ellie M. 16 7B | |
Seismology | The study of earthquakes |
Deformation | The bending, tilting, and breaking of the Earth's crust; the change in the shape of rock in response to stress |
Elastic Rebound | The sudden return of elastically deformed rock to its undeformed shape |
Seismic Wave | A wave of energy that travels through the Earth, away from an earthquake in all directions |
P wave | A seismic wave that causes particles of rock to move in a back-and-forth direction |
S wave | A seismic wave that causes particles of rock to move in a side-to-side direction |
Seismograph | An instrument that records vibrations in the ground and determines the location and strength of an earthquake |
Seismogram | A tracing of earthquake motion that is created by a seismograph |
Epicenter | The point on Earth's surface directly above an earthquake's starting point, or focus |
Focus | The point along a fault at which the first motion of an earthquake occurs |
Gap Hypothesis | A hypothesis that is based on the idea that a major earthquake is more likely to occur along the part of an active fault where no earthquakes have occurred for a certain period of time |
Seismic Gap | An area along a fault where relatively few earthquakes have occurred recently but where strong earthquakes have occurred in the past |