what is the reason for having a line of separation insid the earth ?​

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what is the reason for having a line of separation insid the earth ?​

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Arianna 2 weeks 2021-09-11T12:58:31+00:00 1 Answer 0 views 0

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    2021-09-11T12:59:32+00:00

    as the heat of the earth interior constant but slowly dissipated the Molten core within the earth solidified and shrink . causing the core of mantle boundary to slowly move deeper and deeper within the earth Core

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