Think Tac Toe

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Across
  1. 4. a device that represented the celestial sphere
  2. 5. these spanish _____ conquered parts of the world
  3. 6. ancient civilization that originated in mesopotamia
  4. 7. ancient civilization in peru
Down
  1. 1. ancient civilization in chile
  2. 2. the exchange between the americas, africa and europe
  3. 3. ancient civilization in mexico