Lifecycle of Stars

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Across
  1. 3. most stars are ___ _______ stars.
  2. 5. once all the heat is gone from white dwarfs, they become ______ ________.
  3. 7. the hottest stars
  4. 8. accumulation of gas and dust that will become a star once it reaches 10,000,000 degrees C
  5. 9. an explosion of a dying star
  6. 11. H-R diagrams plot stars based on their ______ and _____.
  7. 12. once red giants have collapsed, if there isn't enough mass to fuse carbon, they become ___ ______.
Down
  1. 1. stars that turn helium into carbon
  2. 2. large clouds of gas and dust, "stellar nursery"
  3. 4. the heat of a star comes from _____ _____.
  4. 6. if there is enough mass to turn carbon into iron, red giants become ______ _________.
  5. 7. if the mass of the core is at least 3 suns (after the supernova), it becomes a ___ ______.
  6. 10. when a core survives a supernova, it becomes a _____ _____.