IMPOSSIBLE CROSSWORD PUZZLE

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Across
  1. 3. 55% of breathable air
  2. 8. opposite of pepsi
  3. 10. a species of animal that can grow bigger than a blue whale hint gross
  4. 11. bigger than big
  5. 12. enter it every time you go on your computer
Down
  1. 1. tick tock
  2. 2. unscramble the word sye
  3. 4. roman lightining god
  4. 5. rocks float around it
  5. 6. ?
  6. 7. solid water
  7. 9. this is easy hint the answer is easy
  8. 11. you will never get this one
  9. 13. install 1 get 20 mil