Stellar Evolution Review

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Across
  1. 4. a magnitude 2.5 star is ____________ than a magnitude 3.5 star
  2. 8. this type of supernova is the result of one star accreting mass from a companion
  3. 9. the sun is categorized as this type of star
  4. 12. this is the order of the letters for stellar classifications
  5. 14. In a massive star, it takes a single _____ to fuse all silicon into iron
  6. 15. Betelgeuse is this type of star (color and size)
  7. 16. type 1a supernovae require _________ star(s)
  8. 17. a star will fuse helium much _____________ than hydrogen
  9. 19. given a fixed volume, if pressure increases then ___________ increases
  10. 20. The Sun will ends its life cycle as a white dwarf with carbon and _________ as the only remaining elements
  11. 22. A blue star is typically ___________ than a red star
  12. 24. type 2 supernovae that create black holes must start with a mass of _________________ times more than the Sun
  13. 25. fusing iron (or in some cases, carbon) causes this to happen
  14. 27. The energy of fusing in the core of stars is the only thing preventing a star from dying due to its own ______________
  15. 28. stars with more mass live much _________ lives than low mass stars
  16. 30. in order to fuse hydrogen into helium, the core of a star needs to reach 15 _______ Kelvin
  17. 31. type 2 supernovae require _________ star(s)
Down
  1. 1. fusing helium produces more ____________ than fusing hydrogen
  2. 2. Compared to other stars, the Sun is relatively _________ in size
  3. 3. this section of the Hertzsprung-Russell Diagram is below the main sequence
  4. 4. over half of the stars in the night sky are in a ___________ system (they have a companion)
  5. 5. this area of the H-R Diagram is where most stars fall.
  6. 6. this is the stage of a low mass (but not too low) star after the red giant phase
  7. 7. this is the name of the stage of a star before it starts fusing hydrogen
  8. 10. there are _________ high mass stars than there are low mass stars
  9. 11. Given a fixed temperature, if pressure increases then _______________ decreases
  10. 13. Supernovae are the only natural way that elements heavier than ______ are created
  11. 14. the force that keeps white dwarfs from collapsing is called electron ___________ pressure which occurs because electrons don’t like being near each other
  12. 18. Hot stars are typically brighter or more ____________ than cooler stars
  13. 21. The Sun’s stellar classification is _______
  14. 23. after hydrogen, the most common element in stars is
  15. 26. K type stars are typically what color?
  16. 29. O type stars are typically what color?