The majority of Earth's mass is concentrated in its mantle, which lies beneath the crust and above the outer core. The mantle accounts for about 84% of Earth's total volume and approximately 68% of its total mass.
The Earth's core, composed primarily of iron and nickel, accounts for about 32% of Earth's total mass. However, the mantle's vast size makes it the most significant contributor to Earth's overall mass.
While the crust is the outermost layer, it makes up only a small fraction of Earth's total mass – less than 1%. The remaining portion of Earth's mass is comprised of the outer core (liquid iron and nickel) and the inner core (solid iron and nickel).
