Stellar Evolution Review

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Across
  1. 3. this is the name of the stage of a star before it starts fusing hydrogen
  2. 5. fusing helium produces more ____________ than fusing hydrogen
  3. 9. there are about 200 ________ stars in the Milky Way
  4. 10. a star will fuse helium much _____________ than hydrogen
  5. 13. this is the order of the letters for stellar classifications
  6. 16. after hydrogen, the most common element in stars is
  7. 19. The Sun will ends its life cycle as a white dwarf with carbon and _________ as the only remaining elements
  8. 20. this area of the H-R Diagram is where most stars fall.
  9. 22. this is the stage of a low mass star after the red giant phase
  10. 23. type 1a supernovae require _________ star(s)
  11. 24. In a massive star, it takes a single _____ to fuse all silicon into iron
  12. 26. K type stars are typically what color?
  13. 31. stars with more mass live much _________ lives than low mass stars
  14. 32. this section of the Hertzsprung-Russell Diagram is below the main sequence
  15. 33. type 2 supernovae require _________ star(s)
  16. 34. given a fixed volume, if pressure increases then ___________ increases
Down
  1. 1. Hot stars are typically brighter or more ____________ than cooler stars
  2. 2. Supernovae are the only natural way that elements heavier than ______ are created
  3. 4. Betelgeuse is this type of star (color and size)
  4. 6. Compared to other stars, the Sun is relatively _________ in size
  5. 7. The Sun’s stellar classification is _______
  6. 8. the force that keeps white dwarfs from collapsing is called electron ___________ pressure which occurs because electrons don’t like being near each other
  7. 9. a magnitude 2.5 star is ____________ than a magnitude 3.5 star
  8. 11. this type of star changes in brightness
  9. 12. fusing iron (or in some cases, carbon) causes this to happen
  10. 14. O type stars are typically what color?
  11. 15. The energy of fusing in the core of stars is the only thing preventing a star from dying due to its own ______________
  12. 17. A blue star is typically ___________ than a red star
  13. 18. the sun is categorized as this type of star
  14. 21. this type of supernova is the result of one star accreting mass from a companion
  15. 25. in order to fuse hydrogen into helium, the core of a star needs to reach 15 _______ Kelvin
  16. 27. type 2 supernovae that create black holes must start with a mass of _________________ times more than the Sun
  17. 28. there are _________ high mass stars than there are low mass stars
  18. 29. Given a fixed temperature, if pressure increases then _______________ decreases
  19. 30. over half of the stars in the night sky are in a ___________ system (they have a companion)