Question

(c) Core is made up of silica and alumina.​

Answer 1

Answer:

》Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel.

Answer 2

Answer:

The main mineral constituents of the continental mass are silica and alumina. ... The oceanic crust mainly consists of silica and magnesium; it is therefore called sima (si-silica and ma-magnesium) (Fig. 2.2). Just beneath the crust is the mantle which extends up to a depth of 2900 km