Rise of humans and Learning to farm

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Across
  1. 2. watering crops
  2. 5. same word as farming
  3. 6. Crescent called the cradle of civilization
  4. 7. exchanging of goods
  5. 9. Period developed more sophisticated tools
  6. 10. of labor people focus on creating one thing becomes great at it
  7. 11. Age humans began using metal to make tools
  8. 12. extra product after needs have been met
  9. 13. left behind after a river floods
Down
  1. 1. advanced state of human society
  2. 3. adapting animals for human use
  3. 4. small city operating like a tiny country
  4. 5. Revolution people stopped being nomadic and grew plants themselves
  5. 8. resources materials humans used to meet a need
  6. 12. hierarchy organizing society into groups