Multiple Choice
Planetesimals, asteroid- size objects, form during the early history of the solar nebula due to ______.
A) collisions of particles of ice, metal, and rocky material rotating about the protosun
B) the formation of comets in the outer parts of the solar nebula
C) the break- up of the solar nebula as it cools and contracts
D) vortices in the rotating disc associated with the protosun
Correct Answer:

Verified
Correct Answer:
Verified
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