Simple Machines/Rube goldberg Machines

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