Social studies crossword puzzle

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Across
  1. 2. Large earth mounds
  2. 4. Ceremonial dinner
  3. 7. Entire way of life for people
  4. 8. Extra food
  5. 10. Spanish word for villages
  6. 12. Spirits
  7. 14. A thick sheet of ice
Down
  1. 1. Cords with knots that stand for numbers
  2. 3. Skills such as farming
  3. 4. House dug in the ground
  4. 5. Wide flat steps of land
  5. 6. A region where people share a similer way of life
  6. 9. A small community
  7. 11. Raised roads made of packed earth
  8. 13. Sun-dried bricks