Question: Earths crust and its core differ greatly in density. After a quick review of Sections 20.1 and 21.2, rank the following elements in order of

Earth’s crust and its core differ greatly in density. After a quick review of Sections 20.1 and 21.2, rank the following elements in order of increasing density:

(a) Iron,

(b) Silicon,

(d) Aluminum.

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