Write any four points how to know about the interior of the earth.

1.	Write any four points how to know about the interior of the earth.
Answer» We can know about the interior of the earth through many ways for example:Through volcano, Mining,By studying earthquake waves(seismology)and through Meteorites.<br>1) Mining- E.g. Gold mines in South Africa which are as deep as 3-4 km.2) Deep Drilling Projects taken up by scientists to explore the conditions in the crustal portions. E.g. \'Deep Ocean Drilling Project\' and \'Integrated Ocean Drilling Project\'. 3) Volcanic Eruption forms another source of obtaining info. by analysing the molten material (magma) thrown onto the surface (lava).4) Analysis of the properties of matter(e.g. Temp., pressure, density etc) indirectly provides info. about the interior of the earth.

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