EESA06H3 Chapter 4: chapter 4
Document Summary
the earth"s crust is a thin skin of rock. earth is divided into three major layers. The earth"s interior: the crust, the mantle, the core. seismic reflection and refraction suggest that the continents are largely igneous and metamorphic rock, such as granite and gneiss, overlain by a veneer of sedimentary rocks. geophysics the application of physical laws and principles to a study of the earth. it was the study of seismic refraction and seismic reflection that enabled scientists to plot the three main zones of the earth. seems to indicate that s waves do not travel through the core at all. meteorites are thought to be remnants of the basic material that created our own solar system. an estimated 10 percent of meteorites are composed of iron mixed with small amounts of nickel. material similar to these meteorites may have helped create the earth.
