The Grand Tack model helps to explain all of these except one. Which is the exception?
A)Mars has a relatively small mass.
B)The asteroid belt contains a few icy objects as well as many rocky objects.
C)Neptune's current location would not allow it to grow rapidly enough to account for its large size.
D)The orbital motions of all the planets are in the same direction around the Sun.

Question

Quizplus · Accepted Answer

The Grand Tack model can explain the small mass of Mars, the composition of the asteroid belt, and the size of Neptune. However, it does not address the direction of the orbital motions of the planets, which is thought to have been influenced by the angular momentum of the solar system during its formation.

The Grand Tack Model Helps to Explain All of These