Big bang

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Across
  1. 1. Think of the______ when the fire truck is passing by
  2. 4. (25%)
  3. 9. This energy was found in the form of___.
  4. 11. Something that is expanding is___.
Down
  1. 2. just like sound light has _______.
  2. 3. the universe is___.
  3. 5. The first piece of ____ supporting the BBT.
  4. 6. If a star is moving away from us ,the light gets ___________.
  5. 7. (74%)
  6. 8. A theory of how the universe began is called the____.
  7. 10. light behaves like _____.