The BIG BIG BIG BANG

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Across
  1. 1. the first event I our universe
  2. 5. what we live in
  3. 6. what comes before neutrons
  4. 7. what pulls things toward the earth
  5. 8. what element is the second most common in the universe
  6. 9. what everything in our universe made of
Down
  1. 1. what it it called when the universe appears blue
  2. 2. what comes after protons
  3. 3. what element is the most common in the universe
  4. 4. what is it called when the universe appears red