General Knowledge Crossword Challenge

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Across
  1. 3. The hardest natural substance on Earth.
  2. 5. The currency used in the United States.
  3. 8. The festival celebrated with lights in India.
  4. 9. The device used to take photos.
  5. 10. The continent where Egypt is located.
  6. 12. The colour you get when you mix red and blue.
  7. 13. The opposite of “young.”
  8. 15. The capital city of Japan.
  9. 18. The planet known as the Red Planet.
  10. 19. The organ that pumps blood through the body.
  11. 22. The process by which plants make food using sunlight.
  12. 24. The country famous for pizza and pasta.
  13. 25. The country with the Great Wall.
  14. 26. The chemical symbol for water.
  15. 27. The bird that can’t fly and lives in Antarctica.
  16. 28. The longest river in the world.
Down
  1. 1. The month with 28 or 29 days.
  2. 2. The tallest animal on Earth.
  3. 4. The language spoken in Brazil.
  4. 6. The gas humans need to breathe.
  5. 7. The instrument with black and white keys.
  6. 9. The opposite of “hot.”
  7. 11. The fruit known for keeping the doctor away.
  8. 14. The animal known as the “King of the Jungle.”
  9. 16. A baby cat.
  10. 17. The largest ocean on Earth.
  11. 20. The fastest land animal.
  12. 21. The largest planet in our solar system.
  13. 23. A shape with three sides.