Crossword Challenge!

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Across
  1. 3. A yellow fruit
  2. 4. A mountain that can erupt
  3. 7. The highest mountain above sea level
  4. 8. A flightless bird that lives in cold regions
  5. 9. The largest planet in our solar system
  6. 14. A colorful arc seen after rain
  7. 16. A musical instrument with strings
  8. 17. An instrument used for writing or drawing
  9. 18. The fourth planet from the Sun
  10. 20. A place where books are kept
  11. 22. A famous rainforest and river
  12. 24. A very hard precious stone
Down
  1. 1. A device used to take photographs
  2. 2. A country famous for its ancient pyramids
  3. 5. A gas humans need to breathe
  4. 6. A large striped wild cat
  5. 7. Famous physicist associated with relativity
  6. 10. A famous ancient Egyptian structure
  7. 11. The largest land animal
  8. 12. The organ responsible for thought and memory
  9. 13. The star at the center of our solar system
  10. 15. A large body of salt water
  11. 19. A place where students learn
  12. 21. Capital city of Egypt
  13. 23. Water that falls from clouds