Be Nice to the Sub Crossword Puzzle

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Across
  1. 2. an object made by people in the past
  2. 3. Sumerian system of writing
  3. 6. to grow crops
  4. 7. Man's best friend
  5. 9. Has a trunk
  6. 13. a culture with complex religion and art etc
  7. 14. Likes to chase mice
  8. 15. study of remains of past cultures
  9. 16. a metal made from mixing tin and copper
  10. 17. an area of land lower than the surroundings
Down
  1. 1. a scientist who studies lives and customs
  2. 4. the agricultural --- that changed human life
  3. 5. to raise and train plants and animals
  4. 8. an area of fertile soil at the mouth of a river
  5. 10. Large marsupial
  6. 11. the weather of a place over a long time
  7. 12. a system of money
  8. 16. Flying mammal