Interesting fact: The mantle makes up about 84% of Earth's volume and drives plate tectonics through convection currents.
The answer: The Earth's mantle weighs approximately 4.0 x 10^24 kilograms (about 4.4 x 10^24 US tons).
Located between the crust and the core, the Earth's mantle extends from about 35 kilometers to 2,900 kilometers deep. It is composed mainly of silicate rocks rich in magnesium and iron. The mantle's semi-solid rock slowly flows over geological time, enabling the movement of tectonic plates and volcanic activity. Its mass accounts for the majority of Earth's total mass.
