A new model explaining this mysterious process suggests the core was created as dribs and drabs of iron percolated inward from Earth's lower mantle, according to a study published Oct. 6 in the journal Nature Geoscience. The mantle is the viscous, rocky layer between the crust and Earth's iron core.
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Related Flashcards. Definition: The totality of an organism's chemical reactions, consisting of catabolic and anabolic pathways, which manage the material and energy resources of the organism. Vocabulary for AP Bio Chapter 8: An Introduction to Metabolism. Find, create, and access Not Set, flashcards with Course Hero.