Leif Catches the Wind

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Across
  1. 4. Someone who works on design and performance of machines
  2. 8. The process of doing something
  3. 9. A way to find creative solutions by following a few steps
  4. 12. When something moves or changes position
  5. 13. A machine that harnesses the energy of the wind to do useful work
  6. 14. Having a reason for doing something or the reason something exists
Down
  1. 1. A rating scale used to measure a wind speed through observations
  2. 2. A tool or device that uses parts working together to help humans do work
  3. 3. A kind of windmill that changes the energy of the air
  4. 5. Achieving maximum productivity with minimum wasted effort
  5. 6. Air that is moving and has energy
  6. 7. Danish word for weather
  7. 10. Anything people create to make their lives easier or solve problems, like inventions or tools
  8. 11. An instrument used to measure the speed of the wind