How Do Scientists Determine What Is Inside Th...
Using Indirect Evidence; Including Seismic Wa...
What Are The Three Layers Of The Earth?
Crust, Mantle, And The Core.
What Are The Two Kinds Of Crust?
Oceanic Crust - More Dense, Made Of Basalt &n...
What Are The Earth's Two Different North Pole...
The Magnetic And Geographic North Pole.