Why is the universe expanding?
A) The energy from all the stars is heating the universe, making it expand like a gas that is heated.
B) Spacetime itself is expanding, carrying the galaxies (or superclusters of galaxies) with it.
C) The universe is not expanding-it is we who are getting smaller, making the universe seem bigger and bigger.
D) An infinitely dense clump of matter exploded, sending the galaxies (or superclusters of galaxies) hurtling out through space.
Correct Answer:
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Q2: Which scientist discovered that the equations he
Q4: Which description is NOT consistent with the
Q5: The expansion of the universe takes place:
A)
Q6: What causes cosmological redshift of photons that
Q7: Which statement is a CORRECT description of
Q8: Why did Einstein introduce his cosmological constant
Q9: Our consistent theories about the evolution of
Q10: What is the "cosmological redshift"?
A) the stretching
Q10: Einstein's general theory of relativity, as originally
Q14: The cosmological redshift of the light from
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