Question

What is the composition of the Earth’s crust?

Answer 1

The earth’s crust is primarily composed of silicate minerals. It is divided into two types:

1. Continental Crust (SIAL): Composed mainly of silica (Si) and aluminium (Al). It is lighter, thicker, and less dense compared to oceanic crust.
2. Oceanic Crust (SIMA): Composed mainly of silica (Si) and magnesium (Mg). It is denser and thinner than the continental crust.

Both types of crust are rich in minerals such as feldspar, quartz, mica, and basalt, with the continental crust being primarily granitic and the oceanic crust primarily basaltic.