After the first solid grains formed in our solar system, these particles could then grow by the process of ____________, the collision and sticking of one particle with another to continue the formation of planetesimals. Each of these has many atoms or molecules.
a. accretion
b. sublimation
c. hydration
d. condensation
e. vaporization
Question 2
The first small solid grains or flakes formed in our solar system by the process of ____________, the addition of material to an object an atom or molecule at a time.
a. accretion
b. sublimation
c. hydration
d. condensation
e. vaporization
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