Question

explain chemical compostion of earths structure​

Answer 1

Explanation:

Core, mantle, and crust are divisions based on composition. The crust makes up less than 1 percent of Earth by mass, consisting of oceanic crust and continental crust is often more felsic rock. The mantle is hot and represents about 68 percent of Earth's mass. Finally, the core is mostly iron metal.

Answer 2

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• The composition of the atmosphere of Earth is 21 percent molecular oxygen, 78 percent molecular nitrogen, and 1 percent argon.
• Direct chemical analysis of surface rocks shows their composition to be primarily oxygen, silicon, aluminum, and iron, in that order of abundance.