The radius of the Earth is

The source of the Earth's magnetic field is-

The core of the earth is made of the mixture of-

The outermost layer crust is ______ % of the earth's volume

The main elements of the denser Oceanic Crust are-

The mantle extends up to the average depth of _______ below the crust.

The core constitutes roughly about _____of the Earth's volume.

Which zone accounts for the Earth's magnesium ?

The crust is broken into plates which are called_______