Statement A: The Earth's inner core is primarily composed of an alloy of iron (ferrous) and nickel, with trace amounts of other elements. This statement is correct. Statement B: The Earth's crust is primarily composed of silicate rocks. The major elements in the Earth's crust are Oxygen, Silicon, Aluminum, Iron, Calcium, Sodium, Potassium, and Magnesium. While simplified, stating it is made up of Silica (Silicon and Oxygen compounds), Aluminium, and Magnesium reflects the major components of the continental crust (rich in Si and Al, often referred to as SiAl) and the oceanic crust (rich in Si and Mg, often referred to as SiMa). This statement is also considered correct in this general context.
Examine the following statements and select the proper option. Statement ‘A’: Inner core of the Earth is made up by Nickel and Ferrous. Statement ‘B’: The Earth’s crust is made up of Silica, Aluminium and Magnesium.
Asked in MPSC CS Prelims 2019 · Topic: The Earth (Interior of the Earth: Crust, Mantle, Core)
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