The Sun's Future: Hydrogen Depletion and Helium Production
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Questions and Answers

What will happen to the core of the sun when the hydrogen supply runs out?

  • It will remain unchanged in size and temperature
  • It will expand and its temperature will decrease
  • It will collapse and turn into a black hole
  • It will shrink and its temperature will increase (correct)

    • What is the next phase of the sun after the core has mostly helium with a thin layer of hydrogen outside?

  • Neutron star
  • Red Giant star (correct)
  • Black Dwarf star
  • White Dwarf star

    • What happens to the sun's temperature when the core shrinks due to the falling reaction rate?

  • It remains constant
  • It increases (correct)
  • It fluctuates
  • It decreases

    • What temperature is needed for helium to 'burn' and produce carbon?

    <p>$600$ million K</p> Signup and view all the answers

    What happens to low mass stars when they cannot reach the temperature needed for carbon fusion?

    <p>They expand to become supergiants</p> Signup and view all the answers

    What is the eventual fate of the earth as the sun becomes a Red Giant star?

    <p>It will be engulfed by the expanded sun</p> Signup and view all the answers

    What does the reaction rate falling cause in the core of low mass stars?

    <p>Shrinkage and heating up of the core</p> Signup and view all the answers

    What happens when helium is depleted in the sun's core and its reaction rate falls?

    <p>Shrinkage and heating up of the core</p> Signup and view all the answers

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