Question

what is the correct order of processes in the accretion of planetesimals? masses of matter form around dust grain, masses of matter collide, and atoms and molecules are added to dust grain. masses of matter collide, masses of matter form around dust grain, and atoms and molecules are added to dust grain. atoms and molecules are added to dust grain, masses of matter form around dust grain, and masses of matter collide. masses of matter collide, atoms and molecules are added to dust grain, and masses of matter form around dust grain.

Explanation:

The process of planetesimal accretion starts with atoms and molecules attaching to dust grains. Then, masses of matter form around the dust grains as more material accumulates. Finally, these masses of matter collide with each other to form larger bodies.

Answer:

Atoms and molecules are added to dust grain, masses of matter form around dust grain, and masses of matter collide.