Types Of Rocks

Question 1

Whats is the lithospheric

Answer 1

The surface of the earth made up of solid rock and soil is called the lithosphere. It comprises the seven continents and the rocky ocean beds

Question 2

What are continents

Answer 2

Continents are large land masses on the surface of the earth. They are usually separated from each other by water bodies called oceans.

Question 3

What is the crust

Answer 3

Crust
SI
12
The crust is solid. It has two parts-+the upper layer is made up of SIAL (silica + aluminium) and the lower layer is made up of SIMA’ (silica + magnesium. The thickness of the crust varies from 8 to 50 km. It is thicker under the continents and thinner under the oceans.

Question 4

What is the mantle

Answer 4

The mantle is semi -solid. It is rich in iron and magnesium. This layer is about 2859 km wide its average density is between 3.5 and 5.5

Question 5

What is the core

Answer 5

Core
The core has two parts- the outer core and the inner core. The outer core is liquid. The inner core is solid. The core starts at a depth of about 2,900 km from the surface of the earth. It is made up mainly of nickel and iron. The density of the core varies from 5.1 to 13.