big bang station challenge

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Across
  1. 2. what the universe is doing
  2. 8. radiation from the origin of the universe
  3. 10. the spectrum of wavelengths
Down
  1. 1. the scientists who discovered the theory of relativity.
  2. 3. particles the size of an atom
  3. 4. the force that keeps everything together
  4. 5. one of the first elements
  5. 6. the creation of the universe
  6. 7. made of leptons
  7. 9. everything that exists