The outermost layer of the Earth is

The minimum thickness of crust under the oceans is

A. 8 km

B. 2 km

C. 5 km

D. 10 km

The inner core of the Earth is made up of

A. copper

B. iron

C. nickel-iron alloy

D. platinum

The division of cores of the Earth includes

A. inner core

B. tectonic core

C. outer core

D. both a and c

The theory which states that the plates of earth are continuously moving is classified as

A. The Trench Drift Theory

B. The Sphere Drift Theory

C. The Continental Drift Theory

D. The Oceanic Drift Theory

The layer below the crust of the Earth is

A. trench

B. mantle

C. core

D. ridge