Once a terrestrial planet had formed from a large number of planetesimals,heat from ____ could have melted it and allowed it to differentiate into a dense metallic core and a lower density crust.
A) radioactive decay
B) the sun
C) volcanic eruptions
D) tidal forces
E) impacts of small meteorites

Question

Quizplus · Accepted Answer

Radioactive decay generates heat within a planet, which can cause melting and differentiation into layers such as a core and crust.

Once a Terrestrial Planet Had Formed from a Large Number