The source of the sun's energy is
A) radioactivity.
B) nuclear fission.
C) nuclear fusion.
D) combustion.
Correct Answer:
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Q7: Sunspots
A) are hotter than the rest of
Q8: The interior of the sun consists of
A)
Q9: Sunspot activity does not affect
A) auroras.
B) the
Q10: A large modern astronomical telescope
A) is designed
Q11: A star whose spectral lines are shifted
Q13: Streams of protons and electrons from the
Q14: The two chief elements in the sun
Q15: The sun has
A) no atmosphere.
B) an atmosphere
Q16: The sun is an)
A) unusually small star.
B)
Q17: The duration of the sunspot cycle is
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