How we know that earth does have core in it as we aren't able to dig across the crust only as deepest hole was about 8-10 km deep only.

Explain is it hypothetical.

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Solution

Everything that is below the earth surface and beyond the reach of humans has been known by the geophysical methods. Seismic waves are the best way to know about the earth's interior. The core of Earth is divided into the outer core which is considered liquid and the inner core is solid. Based on the primary and secondary waves propagation and their velocity, the composition and state of the core, whether it's solid or liquid is known. Also the same is correlated with the meteoritic composition from where it is considered to be accredited

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How we know that earth does have core in it as we aren't able to dig across the crust only as deepest hole was about 8-10 km deep only. Explain is it hypothetical.

How we know that earth does have core in it as we aren't able to dig across the crust only as deepest hole was about 8-10 km deep only.

Explain is it hypothetical.