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Dark Energy, Cosmology part 2
2 years ago by
craniumfire
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  • Question 1
    30 seconds
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    Q.

    How old is the Universe?

    answer choices

    13.82 million years

    82.13 million years

    13.82 billion years

    82.13 billion years

  • Question 2
    30 seconds
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    Q.

    In the past, the entire Universe was a single, infinitely dense point that astronomers call ___

    answer choices

    iota

    the singularity

    the cosmic dot

    the inflection point

  • Question 3
    30 seconds
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    Q.

    On large scales, all the galaxies we see are moving away from each other as space ___

    answer choices

    curves around them

    remains static

    contracts between them

    expands between them

  • Question 4
    30 seconds
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    Q.

    On small scales, the expansion of the Universe is small enough that gravity ___

    answer choices

    is influenced by it

    is negligable

    can overcome it

    cannot overcome it

  • Question 5
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    Q.

    Type 1A supernovae occur when the mass of the white dwarf gets to about ___

    answer choices

    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

  • Question 6
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    Q.

    Astrophysical objects whose intrinsic brightness (luminosity) is known are called ___

    answer choices

    defined torches

    accepted emitters

    standard candles

    regulation lamps

  • Question 7
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    Q.

    In the 1990s, astronomers studying distant supernovae found that the expansion of the universe was ___

    answer choices

    indeterminable

    constant

    decelerating

    accelerating

  • Question 8
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    Q.

    Measurements have shown that the expansion of the universe is like tossing a rock in the air and having it ___

    answer choices

    fall back down into your hand

    slow down only slightly

    hover in mid-air

    shoot upwards faster and faster

  • Question 9
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    Q.

    The Universe is expanding, and that expansion is ___

    answer choices

    getting faster every day

    getting slower every day

    randomly changing

    constant

  • Question 10
    30 seconds
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    Q.

    The unknown force or energy which tends to accelerate the expansion of the universe is called ___

    answer choices

    the faint force

    dark energy

    the shadow force

    black energy

  • Question 11
    30 seconds
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    Q.

    When we make a "budget of stuff" in the cosmos, what percentage is made of stuff we can't directly see?

    answer choices

    5%

    27%

    68%

    95%

  • Question 12
    30 seconds
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    Q.

    The mathematical description of the overall curvature of space, due to mass, is called ___

    answer choices

    the "calculus of the cosmos"

    the "geometry of the universe"

    the "algebra of everything"

    the "statistics of space"

  • Question 13
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    Q.

    We think there's enough dark energy in space to ensure the expansion will ___

    answer choices

    slow, stop, and then re-collapse

    slow then stop

    slow, but never quite reaches zero

    continue forever

  • Question 14
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    Q.

    When light loses energy its wavelength gets ___

    answer choices

    faster

    blueshifted

    shorter

    longer

  • Question 15
    30 seconds
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    Q.

    Extremely distant galaxies are moving away from us at ___

    answer choices

    half the speed of light

    almost the speed of light

    the speed of light

    speeds faster than light

  • Question 16
    30 seconds
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    Q.

    The distance a galaxy would have to be from us to be moving away at the speed of light is about ___

    answer choices

    13.8 million light years

    138 million light years

    13.8 billion light years

    138 billion light years

  • Question 17
    30 seconds
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    Q.

    The most distant galaxies we see are now about 45 billion light years from us. We call this the ___

    answer choices

    radius of the observable Universe

    cosmic event horizon

    maximum isotropic distance

    cosmological constant

  • Question 18
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    Q.

    The observable Universe is ___

    answer choices

    getting smaller

    fixed in size

    getting bigger

    oscillating in size

  • Question 19
    30 seconds
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    Q.

    Eventually the sky beyond our own galaxy will be ___

    answer choices

    black

    visibly filled with galaxies

    a cloudy gray

    white

  • Question 20
    30 seconds
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    Q.

    The Universe itself is expanding, but we see ___

    answer choices

    it rotating

    it oscillating

    less of it every day

    more of it every day

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