General Knowledge Challenge

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Across
  1. 3. The smallest planet in our solar system?
  2. 5. The largest continent by area?
  3. 8. Chemical symbol for water?
  4. 12. Capital of France?
  5. 14. The chemical symbol for gold?
  6. 15. The capital of Spain?
  7. 17. First president of the United States?
  8. 18. The longest river in the world?
  9. 19. The tallest mountain in the world?
Down
  1. 1. The largest ocean in the world?
  2. 2. The first man to walk on the moon?
  3. 4. The capital city of Italy?
  4. 6. Fastest land animal?
  5. 7. Author of "Romeo and Juliet"?
  6. 9. The most spoken language in the world?
  7. 10. The main ingredient in guacamole?
  8. 11. The organ that pumps blood?
  9. 13. The largest planet in our solar system?
  10. 16. Currency of Japan?
  11. 20. The famous tower in Paris?