Question

what is meant by sial & sima​

Answer 1

Explanation:

SIAL is the layer which forms the continents. It is made up of Silica (Si) and Aluminium (Al). SIMA is the layer which makes up the ocean floor. It is called so because it is made up of Silica (Si) and Magnesium (Mg).

Answer 2

Answer:

sial :- the material of the upper or continental part of the earth's crust, characterized as relatively light and rich in silica and alumina.

sima:- the material of the lower part of the earth's crust, underlying both the ocean and the continents, characterized as relatively heavy and rich in silica and magnesia.