The main layers of the Earth in correct order, from the surface moving down is:

a) upper core, outer core, inner core, mantle
b) outer core, inner core, upper mantle, lower crust
c) crust, mantle, outer core, inner core
d) upper mantle, lower mantle, inner core, crust


Answer: c) crust, mantle, outer core, inner core

Environmental & Atmospheric Sciences

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