The Big Bang Theory

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Across
  1. 4. nothing can travel faster than the speed of ______
  2. 6. Which law of thermodynamics does the Big Bang Theory violate?
  3. 9. what type of matter can we not observe?
  4. 10. The rapid expansion of the universe
  5. 13. What year did Hoyle coin the term the "Big Bang"?
  6. 14. After how many thousand years could light shine in the universe
  7. 16. What is the second lightest element?
  8. 17. Stage where matter and energy separated
  9. 20. At the center of a black hole
  10. 21. How many billion years old is the universe?
  11. 22. First name of person who coined "The Big Bang"
Down
  1. 1. name given to when the universe will collapse in on itself
  2. 2. Electrons collided with positrons to form these
  3. 3. The temperature in kelvin of the universe today
  4. 5. As the universe expanded it ______ as well
  5. 7. the universe is this much percent hydrogen
  6. 8. stars clustered together to form what?
  7. 11. the deciding factor on whether or not the universe will continue to expand
  8. 12. What is the volume of matter at a singularity?
  9. 15. What the first letter stands for in CMB
  10. 18. One of Ashwin's favorite medicines
  11. 19. formed from the collapsing of gases