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- 1. Multiple Choice
How old is the Universe?
13.82 million years
82.13 million years
13.82 billion years
82.13 billion years
- 2. Multiple Choice
In the past, the entire Universe was a single, infinitely dense point that astronomers call ___
iota
the singularity
the cosmic dot
the inflection point
- 3. Multiple Choice
On large scales, all the galaxies we see are moving away from each other as space ___
curves around them
remains static
contracts between them
expands between them
- 4. Multiple Choice
On small scales, the expansion of the Universe is small enough that gravity ___
is influenced by it
is negligable
can overcome it
cannot overcome it
- 5. Multiple Choice
Type 1A supernovae occur when the mass of the white dwarf gets to about ___
0.14 times the mass of the Sun
1.4 times the mass of the Sun
14 times the mass of the Sun
140 times the mass of the Sun
- 6. Multiple Choice
Astrophysical objects whose intrinsic brightness (luminosity) is known are called ___
defined torches
accepted emitters
standard candles
regulation lamps
- 7. Multiple Choice
In the 1990s, astronomers studying distant supernovae found that the expansion of the universe was ___
indeterminable
constant
decelerating
accelerating
- 8. Multiple Choice
Measurements have shown that the expansion of the universe is like tossing a rock in the air and having it ___
fall back down into your hand
slow down only slightly
hover in mid-air
shoot upwards faster and faster
- 9. Multiple Choice
The Universe is expanding, and that expansion is ___
getting faster every day
getting slower every day
randomly changing
constant
- 10. Multiple Choice
The unknown force or energy which tends to accelerate the expansion of the universe is called ___
the faint force
dark energy
the shadow force
black energy
- 11. Multiple Choice
When we make a "budget of stuff" in the cosmos, what percentage is made of stuff we can't directly see?
5%
27%
68%
95%
- 12. Multiple Choice
The mathematical description of the overall curvature of space, due to mass, is called ___
the "calculus of the cosmos"
the "geometry of the universe"
the "algebra of everything"
the "statistics of space"
- 13. Multiple Choice
We think there's enough dark energy in space to ensure the expansion will ___
slow, stop, and then re-collapse
slow then stop
slow, but never quite reaches zero
continue forever
- 14. Multiple Choice
When light loses energy its wavelength gets ___
faster
blueshifted
shorter
longer
- 15. Multiple Choice
Extremely distant galaxies are moving away from us at ___
half the speed of light
almost the speed of light
the speed of light
speeds faster than light
- 16. Multiple Choice
The distance a galaxy would have to be from us to be moving away at the speed of light is about ___
13.8 million light years
138 million light years
13.8 billion light years
138 billion light years
- 17. Multiple Choice
The most distant galaxies we see are now about 45 billion light years from us. We call this the ___
radius of the observable Universe
cosmic event horizon
maximum isotropic distance
cosmological constant
- 18. Multiple Choice
The observable Universe is ___
getting smaller
fixed in size
getting bigger
oscillating in size
- 19. Multiple Choice
Eventually the sky beyond our own galaxy will be ___
black
visibly filled with galaxies
a cloudy gray
white
- 20. Multiple Choice
The Universe itself is expanding, but we see ___
it rotating
it oscillating
less of it every day
more of it every day
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