GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which statements describe processes involved in the accretion of planetesimals and protoplanets? Check all that apply.
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Both involve the melting of solid materials in the nebula.
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Both involve the formation of solid particles from nebular materials.
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Both involve the work of the gravitational push on nebular materials.
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Both involve the trapping of gases and the clumping of masses of matter.
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Both involve the growing of gas grains with the addition of atoms and molecules
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Explanation:
Detailed explanation-1: -In planetary science, accretion is the process in which solids agglomerate to form larger and larger objects, and eventually planets are produced. The initial conditions are a disc of gas and microscopic solid particles, with a total mass of about 1% of the gas mass.
Detailed explanation-2: -Within the solar nebula, dust and ice particles embedded in the gas moved, occasionally colliding and merging. Through this process, called “accretion, ‘’ these microscopic particles formed larger bodies that eventually became planetesimals with sizes up to a few kilometers across.
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