Question

2. What is the crust popularly known as and what are its main constituents?​

Answer 1

Answer:

The upper layer of the Earth's crust is called lithosphere. It has 2 parts – upper part is granitic rocks and forms the continents. Its main constituent is Silica and Aluminum and is also called SiAl. It has a density of 2.7. The lower part is denser and is called SiMa [Silica, iron, magnesium].