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
What We Do in the Shadows approval rating of 96% on Rotten Tomatoes based on 163 reviews with an average rating of 7.8 out of 10. It is rated #68 on the website's list of Top 100 comedies of all time. The critical consensus states: "Smarter, fresher, and funnier than a modern vampire movie has any right to be, "What We Do in the Shadows" is bloody good fun." The film also has a score of 76 out of 100 on Metacritic, based on 33 critics, indicating "generally favorable reviews". Fearnet called the film "a great vampire comedy". Film School Rejects wrote a predominantly positive review,