Question

What do u mean by sima and sial?

Answer 1

The uppermost part of the lithosphere is composed of rocks rich in silica and aluminum called sial .Below the sial layer,the rocks are mainly rich in silica and magnesium and are called sima ,which is generally found under the bottom of thw ocean basins

Answer 2

Hiii

SIMA =below the sial layer the rocks are mainly rich in silica and magnesium are called Sima
SIAL=the uppermost part of the lithosphere is composed of rocks rich in silica and aluminium are called sial