geology review questions 6 - 1 What is the difference...

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1. What is the difference between the focus (hypocenter) and the epicenter of an earthquake? (Ch 12.1) A hypocenter is where the earthquake is generated, an epicenter is the point directly above. 2. Define stress and strain. Strain- before faulting, rocks change shape slightly as they are squeezed, pulled and sheared. Stress- the amount of force divided by the area on which the force is applied 3. Describe the behavior of rocks undergoing 1. Elastic Strain, 2. Ductile/Plastic Strain and 3. Brittle Strain. Elastic- the ability of material to strain a small amount and then return to its original shape when the stress is decreased Ductile-a rock or material that is able to flow as a solid or otherwise deform without fracturing or faulting Brittle- a rock or material that deforms by fracturing and frictional processes 4. Contrast the differences between P-waves, S-waves, and surface waves. Describe each wave and compare the speeds. (Ch 12.5)
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  • Fall '15
  • Burberry

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