Sunspot activity does not affect
A) auroras.
B) the earth's magnetic field.
C) volcanic eruptions.
D) shortwave radio communications.
Correct Answer:
Verified
Q4: Stars seem to twinkle because of
A) variations
Q5: Because the spectra of most stars consist
Q6: The spectrum of a star can provide
Q7: Sunspots
A) are hotter than the rest of
Q8: The interior of the sun consists of
A)
Q10: A large modern astronomical telescope
A) is designed
Q11: A star whose spectral lines are shifted
Q12: The source of the sun's energy is
A)
Q13: Streams of protons and electrons from the
Q14: The two chief elements in the sun
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