The distance from the Earth's surface to its center is almost 4,000 miles—but our planet's structure is not uniform and is actually made up of several different layers, some of which are hotter than ...

thermal characteristics (temperature changes), chemical composition, movement, and density. Each of the layers are bounded by "pauses" where the greatest changes in thermal characteristics, chemical ...

Add Yahoo as a preferred source to see more of our stories on Google. Earths Innermos tInner Core While most of us take the ground beneath our feet for granted, written within its complex layers, like ...