Based on its mean density,the dwarf planet Pluto appears to be composed of:
A) rock and iron.
B) a mixture of rock and ice.
C) gases such as methane and ammonia, possibly with a small, liquid core.
D) the very lightest elements, hydrogen and helium.
Correct Answer:
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Q7: Pluto''s mass was poorly known before 1978.What
Q8: Which one of the followingobject is a
Q9: What technique has allowed scientists to determine
Q10: If you were standing on Pluto,how often
Q11: How was the dwarf planet Pluto discovered?
A)
Q14: Which of the following objects was discovered
Q14: Pluto was discovered in
A) 1930.
B) 1846.
C) 1609.
D)
Q15: Which of the following objects was farthest
Q17: Of the followingWhich objects in the solar
Q34: The first satellite discovered in orbit about
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