The outer planets are composed of ____.
A) rock and ice
B) ice and gas
C) metal and ice
D) high density metals
E) low density gas
Correct Answer:
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Q32: What is the process in planetary formation
Q33: Once a protoplanet reached a large mass,
Q34: As a radioactive substance gradually decays, the
Q35: Comets are composed of _.
A) rock and
Q36: According to solar nebula theory, what is
Q38: What astronomical object is the most important
Q39: Who was the first to propose solar
Q40: The inner planets are composed of _.
A)
Q41: Match the planetary body with its definition.
Q42: Which best describes the transit method?
A) observing
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