Puzzle - 15: Trivia and General Knowledge

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Across
  1. 1. The process of a caterpillar transforming into a butterfly.
  2. 3. The painting with a mysterious smile.
  3. 7. The number of bones in the adult human body
  4. 11. The national flower of Japan.
  5. 12. The largest mammal on Earth.
  6. 13. The element with the chemical symbol Fe.
  7. 14. The force that pulls objects toward the center of the Earth.
  8. 15. The largest planet in our solar system.
  9. 16. The longest river in the world.
  10. 17. The process of plants converting sunlight into energy.
  11. 18. The planet known as the "Red Planet".
Down
  1. 2. The year the Titanic sank.
  2. 4. The birthplace of the Renaissance.
  3. 5. The chemical symbol for gold.
  4. 6. The capital of France.
  5. 8. The chemical symbol for water.
  6. 9. The author of "Romeo and Juliet".
  7. 10. The largest ocean on Earth
  8. 11. The number of continents on Earth.
  9. 19. The star closest to Earth