Interior of the Earth

Density of the core is highest because-

• due to heavy pressure of overlying rocks

• due to heavy temperature of overlying rocks

• due to heavy density of overlying rocks

• none of the above

The radius of the Earth is

• 6317 km

• 7631 km

• 6371 km

• 7136 km

The source of the Earth's magnetic field is-

• outer mantle

• liquid outer core

• lower crust

• outer crust

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

• Silica and nickel

• Nickel magnesium

• Silica and magnesium

• Nickel and iron

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

• 0.05

• 0.5

• 16

• 83

The main elements of the denser Oceanic Crust are-

• silicon and aluminium

• silicon and magnesium

• silicon and iron

• silicon and copper

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

• 2900 km

• 1900 km

• 4900 km

• 3900 km

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

• 37 %

• 73 %

• 83 %

• 16 %

Which zone accounts for the Earth's magnesium ?

• Mantle

• Core

• Crust

• None of the above

The crust is broken into plates which are called_______

• lithospheric

• biospheric

• Oceanic

• None of the above