Multiple Choice
Interstellar space in our galaxy
A) is completely empty.
B) is completely empty except for clouds of gas and dust.
C) contains about 1 atom or molecule per cm3.
D) contains about 1 atom or molecule per cm3between denser clouds of gas and dust.
Correct Answer:

Verified
Correct Answer:
Verified
Q21: Globular clusters of stars<br>A) are uniformly distributed
Q22: Dark matter<br>A) apparently occurs only in our
Q23: Primary cosmic rays consist of<br>A) atomic nuclei,
Q24: The stars in globular clusters<br>A) are relatively
Q25: Immediately after the big bang, the universe
Q27: The galaxies in the universe are distributed<br>A)
Q28: Nearly all the helium in the universe
Q29: The number of galaxies in the universe
Q30: Considering matter and energy together, the largest
Q31: Galactic spectra show<br>A) red and blue shifts.<br>B)