Simple Machines

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Across
  1. 5. A flat surface with one end higher than the other.
  2. 8. ________ order levers have the fulcrum in the middle.
  3. 9. Rod or bar that rests on a fulcrum or pivot.
  4. 10. An inclined plane that wraps around a post.
  5. 11. A tool used to make work easier.
Down
  1. 1. A wheel with a groove that a rope runs through and attaches to a load.
  2. 2. Is reduced when surfaces are smoother.
  3. 3. Wheels with teeth.
  4. 4. Two inclined planes joined together to form a point.
  5. 6. A force that is needed to move a load.
  6. 7. Allows a wheel to turn.