1. The mantle is located below the crust of the earth. The mantle is divided into the upper mantle and the lower mantle. 

2. The thickness of the mantle is approximately 2870 km. The average density of mantle is approximately 4.5 gm/cm³ . 

3. The rocks in the upper 100 to 200 km of the mantle melt due to the heat and magma is created.

Magma chambers are found in this layer of the earth. Due to the heat and pressure, the energy waves are created in mantle. These energy waves move in vertical direction and magma comes out on the surface of the earth by volcanic eruptions. 

4. These endogenitic movements continuously occur in the upper layer of the mantle. Therefore, the upper layer of the mantle is known as the asthenosphere.

5. The average thickness of mantle is approximately 2870 km. Its average density is approximately 4.5 gm/cm³ . The temperature at the depth of 2400 to 2900 km is around 2200° to 2500° C. The density of the lower mantle is approximately 5.7 gm / cm³