What two elements comprise most of a nebula?
A) hydrogen and helium
B) hydrogen and nitrogen
C) oxygen and lithium
D) carbon and hydrogen
E) helium and lithium
Correct Answer:
Verified
Q2: The Earth's layered composition is a consequence
Q3: The early atmosphere on Earth included
A) methane
Q4: The birth of a solar system would
Q5: What are some health hazards of long
Q6: The composition of the Earth's Moon is
Q8: The mantle of the Earth can be
Q9: The impact collision theory of the Moon's
Q10: The inner core at the center of
Q11: Why are the Jovian planets formed from
Q12: Which scientist is credited with the discovery
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