Question

Explain the core of the earth.

Answer 1

Instructions:

• Explain.

Solution:
The core starts from around the depth of about 2900 km from the earth’s surface. The part of the earth’s interior extending from the mantle up to the center of the earth is the core.

OUTER CORE: Outer core extends from around 2900 km to 5100 km. The secondary waves cannot pass through the core. They get absorbed in this region. This has led scientists to believe that the core could be liquid or semi-liquid in nature. The primary waves travel through this layer. But their speed reduces when passing through this layer. The density of the outer core is 9.8 gm/cm3. The temperature of the liquid outer core is around 5000° C.

INNER CORE: Inner core extends from around 5150 km to a depth of around 6371 km (earth’s center.) It is the core of the earth which is in a solid state. The density of this sphere is around 13.3 gm/cm3. Iron and nickel are the major elements found here.