Question

The existence of a core-mantle-crust interior structure tells us that a world __________. a. is undergoing interior convection b. formed initially from metal, around which rock was later added c. once had a molten interior d. has a molten interior today

Answer 1

Answer:

Option (C)

Explanation:

The core of the earth was initially formed during the accretion of the planetary materials, as a result of which the metal originated from the impactors got submerged through a vast ocean of magma and eventually got accumulated at the center of the earth. This is how the early earth was comprised of a molten interior where the denser iron, nickel, and other siderophile elements were present.

This liquid form of metal after coming in contact with the liquid silicate was subjected to extremely high pressures and temperature condition, that subsequently led to the formation of the present day-core and mantle composition.

Thus, the earth once had a molten interior.

Hence, the correct answer is option (C).