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Across
  1. 3. Canyon carved by Colorado River
  2. 6. Largest river in South America
  3. 7. Third largest ocean
  4. 10. World's highest mountain peak
  5. 12. Smallest continent by land area
  6. 14. Sea bordered by Scandinavian countries
  7. 16. Mountain range containing Everest
  8. 17. Sea between Africa and Arabian Peninsula
  9. 18. Sea known for its reef system
  10. 20. Longest river in the world
  11. 22. Largest hot desert on Earth
  12. 23. Famous national park in Wyoming
  13. 24. Northernmost ocean
  14. 25. Sea between Alaska and Russia
Down
  1. 1. Coldest continent on Earth
  2. 2. Sea between Europe and Africa
  3. 4. Major mountain range in North America
  4. 5. Longest mountain chain in the world
  5. 8. Sea west of India
  6. 9. Saltiest sea on Earth
  7. 11. Largest ocean by surface area
  8. 13. World's largest inland body of water
  9. 15. World's largest island
  10. 19. Second largest ocean
  11. 21. Sea southeast of Gulf of Mexico