Structure of the Earth easily than does the upper mantle (chemical changes within the mantle may also be important). The viscosity of the mantle ranges between 10 and 10 Pa·s, depending on depth. In comparison, the viscosity of water is approximately 10 Pa·s and that of pitch is 10 Pa·s. The source of heat that drives plate tectonics is the primordial heat left over from the planet’s formation as well as the radioactive decay of uranium, thorium, and potassium in Earth’s crust and mantle. The average density of Earth is . Because the average density of surface material is only around , we must
We Do What We Want MP3 for the song "Scissors" was divided into seven sections. For seven consecutive days, one new piece of the song was revealed through a different online media outlet. The band would give a clue as to where the next clip would be released on their Facebook page, and fans were encouraged to collect all of the parts and put the song back together. Also prior to the release of "We Do What We Want", Emery previewed "The Cheval Glass," "I Never Got to See the West Coast" and "The Curse of Perfect Days." "We Do What We Want" was released