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Technology

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Across
  1. 2. piping
  2. 4. steel
  3. 6. car
  4. 7. heart valve
  5. 9. cheeseburger
  6. 10. bottled water
  7. 13. plastic
  8. 15. use of steel and iron
  9. 16. wood
  10. 17. plastic
  11. 18. 450-1400AD
  12. 19. 2300BC-700BC
  13. 20. rebirth
Down
  1. 1. liquids
  2. 3. stone tools
  3. 5. development of manufacturing and transportation
  4. 8. the processing and exchange of information
  5. 11. wool socks
  6. 12. consumable goods
  7. 14. carbon fiber