To understand how earth’s interior structure was formed, we need to go back in time to its formation during the birth of the solar system. astronomers believe that when earth and the other terrestrial planets formed, a process called differentiation occurred. rank the steps of the differentiation process in order from the initial stage to the final stage. a. heating and melting of rock
b. cooling and solidification of rock layers (final stage)c. sinking of heavier metals toward center and floating of lighter rocks towards the surface
d. intense bombardment and radioactivity (initial stage)