crossword for the cool

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Across
  1. 3. a line of slaves or animals fastened together
  2. 4. known for their writing
  3. 5. conquered the Incas
  4. 7. boast or be praised
  5. 9. a advanced group of people
  6. 12. abolish an act
  7. 13. advanced civilization
  8. 15. the earth
  9. 16. what you eat
  10. 18. what your civilization, country, or culture is run by
  11. 19. first person to sail around the world
Down
  1. 1. a long trip
  2. 2. a writing style that only contains symbols
  3. 6. a belief of the afterlife
  4. 8. a Spanish conqueror
  5. 10. an enclosure for slaves
  6. 11. what people worship
  7. 14. Exchange a time were people from the old world traded knowledge and goods with the new world
  8. 17. Cortes conquered the Aztecs
  9. 20. rules you have to abide