Simple Machines/Rube Goldberg Machines

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Across
  1. 3. who would like to use it
  2. 5. how is it helpful
  3. 8. what is a rube Goldberg machine
  4. 10. why did he make it
  5. 11. when was it invented
  6. 14. why is it helpful
  7. 16. how did he invent it
Down
  1. 1. what can it do
  2. 2. who will get benefit from it
  3. 4. who did he do it for
  4. 6. who might like it
  5. 7. how can you use it
  6. 9. how might it be useful
  7. 12. what would he do if it didn't work
  8. 13. when can you use it
  9. 15. Who is the person that invented Rube Goldberg Machines