Although spectacular collisions like comet Shoemaker-Levy 9 impact with Jupiter in 1994 provide evidence that planetary accretion is still occurring, near all the mass of the solar nebula now resides in the sun and planets. When did Earth, for the most part, attain its current mass and volume?
A) 65 million years ago
B) 12,000 years ago
C) it hasn't
D) 4,500 million years ago

Question

Quizplus · Accepted Answer

The Earth attained its current mass and volume around 4,500 million years ago during the process of planetary accretion in the early stages of the solar system.

Although Spectacular Collisions Like Comet Shoemaker-Levy 9 Impact with Jupiter