Magnetic Drill

Magnetic Drill

What proof is there that the core of the earth is molten iron?

I hear this fact all the time, but since the farthest any drilling project has ever made it is only 4.81 miles, how do scientists confirm this spinning core of liquid iron that supposedly controls our magnetic field?

Actually, the innermost core is solid nickel and iron.
The theories regarding the composition of the interior rely on seismic measurements. By setting off charges and recording them at different sites around the world, you can figure out what the core is made of.

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