Question

which statements describe processes involved in the accretion of planetesimals and protoplanets? check all that apply. both involve the melting of solid materials in the nebula. both involve the formation of solid particles from nebular materials. both involve the work of the gravitational push on nebular materials. both involve the trapping of gases and the clumping of masses of matter. both involve the growing of gas grains with the addition of atoms and molecules

Explanation:

• Planetesimals and protoplanets form from the accretion of solid particles in a nebula. This involves the trapping of gases and clumping of matter as well as the growth of solid - like gas grains by addition of atoms and molecules. Melting of solid materials is not a primary process in the initial accretion. Gravitational pull (not push) is what acts on nebular materials for accretion.

Answer:

• Both involve the formation of solid particles from nebular materials.
• Both involve the trapping of gases and the clumping of masses of matter.
• Both involve the growing of gas grains with the addition of atoms and molecules.