What is a shock wave?
A) A pressure wave that moves faster than the speed of sound
B) A pressure wave that moves slower than the speed of sound
C) A pressure wave that moves faster than the speed of light
D) An electromagnetic wave that can create electrical shocks
E) An electromagnetic wave created when electrons recombine with protons
Correct Answer:
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Q4: What kinds of objects lie in the
Q11: How are interstellar bubbles made?
A) by the
Q12: Where are most heavy elements made?
A) In
Q14: Sound waves in the interstellar medium
A) cannot
Q15: How does the interstellar medium obscure our
Q16: What elements do astronomers consider heavy elements?
A)
Q17: What makes up the interstellar medium?
A)open clusters
B)O
Q18: Harlow Shapley concluded that the Sun was
Q20: What is the thickness of the disk
Q23: Where do most dust grains form?
A)in supernovae
B)in
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