The Empty Square Escapade

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Across
  1. 6. The largest moon of Jupiter, also the largest moon in our solar system
  2. 7. The name of the longest river in South America
  3. 10. The 44th president of the United States
  4. 11. The name of the largest island in the world
  5. 13. The largest of the Channel Islands
  6. 15. The name of the first satellite launched into space
  7. 16. The smallest country in the world by population
  8. 17. The name of the ship that Charles Darwin sailed on
Down
  1. 1. The name of the largest ocean trench in the world
  2. 2. The highest mountain range in the world
  3. 3. The currency of Japan
  4. 4. The longest bone in the human body
  5. 5. The name of the first dog to orbit the Earth
  6. 8. The name of the theatre where Abraham Lincoln was assassinated
  7. 9. The name of the first woman to fly solo across the Atlantic Ocean
  8. 10. The capital of Brazil
  9. 12. The study of earthquakes
  10. 14. The name of the largest type of penguin