Quiz
Low Mass Stars
3 years ago by
craniumfire
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  • Question 1
    30 seconds
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    Q. Very roughly speaking, we can divide stars into two groups: ___
    answer choices
    low mass stars, and high mass stars
    bright stars and dim stars
    dwarfs and giants
    low mass stars, and super-giants
  • Question 2
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    Q. The dividing line between low mass stars and high mass stars lies around ___
    answer choices
    half the mass of the Sun
    twice the mass of the Sun
    eight times the mass of the Sun
    80 times the mass of the Sun
  • Question 3
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    Q. During the fusion of hydrogen, four protons, plus some other ingredients, get turned into ___
    answer choices
    four neutrons
    four photons
    one helium nucleus
    one lithium nucleus
  • Question 4
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    Q. A higher mass star squeezes hydrogen harder, so ___
    answer choices
    it fuses more slowly
    it fuses more quickly
    it fuses into lithium
    it fuses into deuterium
  • Question 5
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    Q. For a star, the lower its mass, ___
    answer choices
    the larger its apparent magnitude
    the brighter it is
    the shorter it lives
    the longer it lives
  • Question 6
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    Q. How long can a really low mass red dwarf last?
    answer choices
    a thousand years
    a million years
    a billion years
    a trillion years
  • Question 7
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    Q. When a low mass red dwarf dies, it will be nearly pure ___
    answer choices
    hydrogen
    helium
    lithium
    deuterium
  • Question 8
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    Q. With stars like the Sun, the material in the core ___
    answer choices
    stays in the core
    convects to the radiative zone
    mixes with the convective zone
    convects to the surface
  • Question 9
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    Q. What is the total life span of the Sun?
    answer choices
    about two million years
    about twelve million years
    about two billion years
    about twelve billion years
  • Question 10
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    Q. The Sun's cores is getting ___ 
    answer choices
    less dense and hotter
    less dense and cooler
    denser and hotter
    denser and cooler
  • Question 11
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    Q. Since it was born, the Sun has increased in luminosity by about ___ 
    answer choices
    8%
    40%
    80%
    400%
  • Question 12
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    Q. When the Sun runs out of hydrogen in the core, ___
    answer choices
    it will fuse helium into carbon
    it will fuse helium into oxygen
    it will fuse helium into neon
    hydrogen outside the core will start to fuse
  • Question 13
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    Q. As the Sun grows to well over twice its current size, it will be classified as ___
    answer choices
    a subgiant
    a giant
    a supergiant
    a hypergiant
  • Question 14
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    Q. As the Sun bloats up to 10 to 150 times its present size, it will be classified as ___
    answer choices
    a red subgiant
    a red giant
    a red supergiant
    a red hypergiant
  • Question 15
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    Q. When it turns into a red giant, the Sun will increase its luminosity by about ___
    answer choices
    two times
    20 times
    200 times
    2000 times
  • Question 16
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    Q. At some point, after being a red giant, the Sun's core will heat up enough to fuse helium into ___
    answer choices
    carbon
    silicon
    sodium 
    iron
  • Question 17
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    Q. When fusion has stopped, and the Sun has blown off its outer layers, it will be classified as ___
    answer choices
    a white dwarf
    a red dwarf
    a white subgiant
    a red subgiant
  • Question 18
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    Q. When the Sun expands, it'll reach a radius very close to the size of ___
    answer choices
    Mercury's orbit now
    Neptune's orbit now
    Earth's orbit now
    Jupiter's orbit now
  • Question 19
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    Q. As the Sun expands it loses mass, and the Earth will ___
    answer choices
    move toward the Sun, into a smaller orbit
    move out from the Sun, into a bigger orbit
    move toward the Sun, into a tidal locked orbit
    move out from the Sun, into a tidal locked orbit
  • Question 20
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    Q. In order to squeeze carbon nuclei hard enough to fuse them together, a star needs a mass ___
    answer choices
    about twice the Sun's mass
    about 8 times the Sun's mass
    about 40 times the Sun's mass
    about 80 times the Sun's mass
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