Marshall Wei's Egyptian Crossword Puzzle

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Across
  1. 4. paths followed by traders?
  2. 7. the world's longest river
  3. 9. life after death?
  4. 10. huge triangular tombs built by Egyptians?
Down
  1. 1. rich and powerful people?
  2. 2. have great wealth and power?
  3. 3. specially treated bodies wrapped in cloth for preservation?
  4. 5. the application of scientific and mathematical knowledge for practical purposes?
  5. 6. a triangular shaped area of land made from soil deposited by a river?
  6. 8. rapids along the Nile River
  7. 11. a series of rulers from same family