Big Bang

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Across
  1. 3. Gave us a better understanding of the universe
  2. 5. Frequencies of sound waves
  3. 6. Waves moving towards us
  4. 9. Silent explosion
  5. 10. Also gave us a better understanding of the universe
  6. 12. Waves moving towards us
Down
  1. 1. Particles that are smaller than atoms
  2. 2. Made up of all matter
  3. 4. the thing responsible for creating galaxies and stars
  4. 7. the first two chemicals
  5. 8. Leftover energy from the big bang
  6. 11. Different color light