Simple Machines Cross-word

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Across
  1. 3. what a screw driver is used for
  2. 7. the pivot or the fixed part needed to work with a bar
  3. 8. a rigid bar resting on a pivot
  4. 9. keeping or showing a balance; arranged in good proportions
  5. 11. any of the basic mechanical devices for applying a force
  6. 12. a wheel with a groove in it in which a rope can be passed to raise or lower a load
  7. 13. a circular object that revolves on an axle
Down
  1. 1. a surface of which one end is higher than the other
  2. 2. a plane inclined at an angle
  3. 4. a rod (either fixed or rotating) passing through the center of a wheel or group of wheels
  4. 5. the resistance that one surface encounters when moving against another surface
  5. 6. the force that attracts all objects toward the center of the Earth
  6. 10. the weight or mass that is being supported or carried
  7. 13. an object that has one thick end that tapers to a thin edge on one side.