WORLD 21

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Across
  1. 3. Planet named after sea god
  2. 4. King of the jungle
  3. 8. Landform lower than mountain
  4. 9. Planet with tilted axis
  5. 11. Flat expanse of land
  6. 14. Negative particle orbiting nucleus
  7. 16. Striped African animal
  8. 18. Large inland body of water
  9. 20. Icy body with a tail
  10. 21. Dry, barren area of land
  11. 22. Vast body of salt water
  12. 27. Shooting star
  13. 29. Neutral particle in nucleus
  14. 30. Striped big cat
  15. 31. Large coastal inlet
  16. 32. Our home galaxy
  17. 33. Molecule carrying genetic code
Down
  1. 1. Largest planet in solar system
  2. 2. Basic unit of life
  3. 5. Planet with rings
  4. 6. Positive particle in nucleus
  5. 7. Large natural watercourse
  6. 10. Smaller body of salt water
  7. 11. Once considered a planet
  8. 12. Organ that pumps blood
  9. 13. Rigid organ in vertebrates
  10. 15. Low area between hills
  11. 17. Smallest unit of matter
  12. 19. Large elevated landform
  13. 21. River mouth landform
  14. 23. Rock orbiting the sun
  15. 24. Organ used for breathing
  16. 25. Organ that controls body
  17. 26. Huge system of stars
  18. 28. Coastal body of water