Structure of the Earth decay of radioactive elements, and freezing of the inner core. Structure of the Earth The internal structure of the Earth is layered in spherical shells: an outer silicate solid crust, a highly viscous asthenosphere and mantle, a liquid outer core that is much less viscous than the mantle, and a solid inner core. Scientific understanding of the internal structure of the Earth is based on observations of topography and bathymetry, observations of rock in outcrop, samples brought to the surface from greater depths by volcanoes or volcanic activity, analysis of the seismic waves that pass through the Earth, measurements of
It'z Just What We Do It'z Just What We Do It'z Just What We Do is the second EP by American country music duo Florida Georgia Line. It was released in May 2012, by Big Loud Mountain. All five songs from the album later appeared on their debut studio album, "Here's to the Good Times" (2012). Jessica Nicholson of "Country Weekly" gave the album a very positive review, saying that "Newcomers Brian Kelley and Tyler Hubbard of Florida Georgia Line first met while students at Nashville’s Belmont University, and melded their diverse musical backgrounds to create their first five-song EP. No softhearted love songs here,