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1.the blank of solar system formation is grounded in the idea that dust grains form clumps of matter that collide and slowly accumulate until they are planetary size.
a. condensation theory
b. expulsion theory
c. collision theory
d. fragmentation theory
2. what do all of the jovian planets possess that none of the terrestrial planets does?
a. natural satellites
b. water vapor
c. solid cores
d. numerous moons and ring systems
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