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Cutaway Model of Earth

Cutaway Model of Earth
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Description: Early Earth was initially a homogeneous mixture of elements with no continents or oceans.
(a) Molten iron sank to the center and light material floated upward to form a crust. (b) As
a result, Earth has a dense iron core and a crust of light rock, with a mantle of intermediate
density between them
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Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=15967
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