Life Cycle of Stars

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Across
  1. 2. what causes matter to accrete and form a star.
  2. 5. when a star runs out of hydrogen fuel, it begins to _____. This causes the pressure in the core to increase.
  3. 6. this is the heaviest element that can be made from sustained fusion in a stars core.
  4. 7. the final stage of a low or average mass stars life.
  5. 10. the longest stage of a stars life, when a star fuses hydrogen into helium
  6. 13. one of the possible outcomes for a supermassive star. These are so dense nothing can escape its gravitational pull.
  7. 16. this is what stars create from fusing hydrogen
  8. 18. the explosion of supermassive star
  9. 19. the largest stars possible
  10. 20. when a star begins to fuse elements heavier than hydrogen it will grow bigger, or _____.
  11. 21. an early age of the stars life before nuclear fusion begins.
Down
  1. 1. the glowing remains of a low or average mass star
  2. 3. this is what stars use as fuel during their main sequence
  3. 4. The measure of how hot or cold a star is.
  4. 8. when a star grows to a certain size its called a ____.
  5. 9. one of the possible outcomes for a supermassive star. These are so dense all protons and electrons are combined.
  6. 11. a large cloud of gas and dust that will eventually form into a star
  7. 12. the combination of light elements to form heavier elements
  8. 14. the type of visible light given off by a star.
  9. 15. the type of nebula that forms at the end of a stars life when its matter is slowly disperses outwards.
  10. 17. The measure of how much “stuff” makes up a star.