Question

prepare a short note about layers of earth​

Answer 1

Answer:

Structure of Earth refers to concentric spherical layers subdividing the Solid earth, into four different layers of earth.

They are the inner core, the outer core, the mantle, and finally, the crust.

a) The Inner core:-

1. The inner core is the fourth layer of the Earth, and it is the hottest layer inside the earth.

2. The inner core is the central and the second thinnest layer of the earth.

3. It is composed of dense materials which accumulated during the formation of earth-like iron, nickel.

b) The Outer core:-

1. The outer core is the third layer of the Earth.

2. It is the only liquid layer of the earth, which is very thick and made of iron and nickel.

3. This layer is so hot that all metals in it are in a liquid state.

c) The mantle:-

1. There are two types of mantle present in the earth upper mantle and lower mantle.

2. The upper mantle is the second most layer below the crust. All the material in the mantle is semi-molten to solid-state. The mantle has convectional currents in it which are responsible for tectonic movements of the Earth's crust.

3. The lower mantle is larger than the upper mantle and it reaches a depth of 400-1,800 miles. The lower mantle is less dense and is mostly solid due to high temperature and pressure.

d) The crust:-

1. The crust is the uppermost layer of the earth. It is also the thinnest layer of the earth.

2. the crust is made up of sila (silica and aluminum) and sima (silica and magnesium) rocks.

3. The crust has split up into two parts the continental crust and the oceanic crust.

Answer 2

• As we know that the earth is divided into four layers i.e inner core, outer core, mantle, and crust.

• The inner core is composed of dense materials, it is the hottest layer and it is a central layer of the earth.

• The outer layer is thick and made of nickel, iron, etc. it is a hot and liquid layer.

• The mantle layer is divided into the upper and lower mantle. it has convectional currents.

• The crust is a thin uppermost layer, composed of sila and sima rocks.