Give Reasons for the following:

SIAL floats over SIMA.

The majority of the earth’s surface comprises of SIAL which is the combination of Silica and Aluminium. This SIAL is found in the crust layer of the earth. The lower layer of the earth’s crust that is mantle comprises of SIMA. The SIMA is the abbreviation used to describe the minerals of Silicon and Magnesium.

The content of Silica in SIAL is more than that of SIMA. This makes the SIAL less dense than that of SIMA. It is the density of the minerals makes the floating and submerges of the elements.