What are the two most abundant elements that make up the composition of the Sun?
A) lithium and magnesium
B) iron and steel
C) nitrogen and oxygen
D) hydrogen and helium
Correct Answer:
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Q13: The reaction known as the _ chain
Q14: In the Hertzsprung-Russell diagram, _ stars populate
Q15: A photon from a dying star may
Q16: Which type of stars appear at the
Q17: Outbursts of glowing gas and plasma emerging
Q19: The Hertzsprung-Russell diagram shows astronomers the relationship
Q20: A square meter at the top of
Q21: Our Sun currently falls on the main
Q22: Astronomers can distinguish galaxy types based on
A)shape
Q23: In the life cycle of stars, nebulae
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