SIMPLE MACHINES

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Across
  1. 4. a strait rod or board that pivots on a point used to lift objects
  2. 5. an example of a lever
  3. 8. a wheel that usually has a groove around the outside edge
  4. 9. an example of an inclined plane
  5. 10. a sloping surface used to alter the effort and distance involved in doing work
  6. 13. two or more simple machines working together
  7. 15. the groove on a screw
  8. 16. that handle that turns a wheel
Down
  1. 1. simple machines are tools that help make work _____
  2. 2. two toothed wheels that fir together
  3. 3. an example of a pulley in the school yard
  4. 6. simple machines have no _____ parts
  5. 7. something that has gears
  6. 11. input/output work, that is used to over come friction
  7. 12. two inclined planes joined back to back
  8. 14. machines that are round and turn to make things go