Why did the solar nebula flatten into a disk?
A)The interstellar cloud from which the solar nebula formed was originally somewhat flat.
B)The force of gravity from the Sun pulled the material downward into a flat disk.
C)As the nebula cooled,the gas and dust settled onto a disk.
D)It flattened as a natural consequence of collisions between particles in the spinning nebula,changing random motions into more orderly ones.
E)The force of gravity from the planets pulled the material downward into a flat disk.

Question

Quizplus · Accepted Answer

As the solar nebula spun, the collisions between particles caused them to lose their random motions and settle into a more orderly rotation around the center of mass. This resulted in the flattening of the nebula into a disk shape.

Why Did the Solar Nebula Flatten into a Disk