Question

Distinguish between SIALand SIMA. (4points)​

Answer 1

Answer:

Sial is composed of silicon and aluminium.It is upper layer which forms a discontinuous cover over the Earth's crust and is entirely absent the ocean floor. Sima is composed of silicon and magnesium. This is the second layer below sial which forms the ocean base. It is also called oceanic crust.

Answer 2

Answer:

SIAL

1. It is earths crusts upper layer
2. Made up of those rocks rich in silicate and aluminium rich elements
3. It forms continental crust

SIMA

1. It is the lower layer of the earths crust
2. Made up of the rocks rich in magnesium silicate rich minerals
3. It forms oceanic crust