chapter12 - Chapter 12 Earth's Interior Gravity and angular...

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    Chapter 12   Earth’s Interior Gravity and angular momentum Magnetic field Volcanoes Meteorites Heat flow measurements Seismology
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    Key Concepts/Questions Why do seismic waves travel in curved paths? Which way do they curve and why? What are the layers that are different compositions? What layers are defined by physical properties What is the seismic signature of the Moho? How do we know that the outer core is liquid? What is the shadow zone? How is the base of the lithosphere (top of asthenosphere) defined? What is the source of the magnetic field? How is heat transferred out of the earth?
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        Probing Earth’s interior Most of our knowledge of Earth’s interior comes from the study of earthquake waves Travel times of P (compressional) and S (shear) waves through the Earth vary depending on the properties of the materials Variations in the travel times correspond to changes in the materials encountered
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      Probing Earth’s interior The nature of seismic waves When seismic waves pass from one material to another: some of the energy is reflected back up ( < incidence = < Reflection)
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This note was uploaded on 03/27/2008 for the course GEOL 101 taught by Professor Olinsky during the Fall '08 term at Texas A&M.

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chapter12 - Chapter 12 Earth's Interior Gravity and angular...

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