Which process is responsible for the planetary formation of Earth?
A) Accretion of small bodies called planetesimals
B) Erosion of an existing, larger planet
C) Collision of two medium-sized moons
D) Massive eruptions of magma which built up Earth's rocky surface
E) Implosion of a nearby supernova

Question

Quizplus · Accepted Answer

The process responsible for the planetary formation of Earth is accretion of small bodies called planetesimals. These planetesimals collided and merged together, gradually building up the mass and size of Earth over millions of years.

Which Process Is Responsible for the Planetary Formation of Earth