Question

=> What lies underneath the hard surface on which we stand?
=> Has anyone ever seen the interior of the earth?
=> How much one has to dig up to see the centre of the earth?
=> How far has it been possible to know the interior of the earth?
=> By what means has man got so much knowledge about the earth's interior?


$please \: solve \: those \: questions$
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Answer 1

Answer:

answer b) we have to dig the earth of what the density or size of the earth

Answer 2

Explanation:

What lies underneath the hard surface on which we stand?