Simple Machines

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Across
  1. 4. Wheel and axle tool for screws
  2. 5. Tall object where pulleys raise a flag
  3. 7. Tool for chopping wood
  4. 10. Lever for digging holes
  5. 13. Two back-to-back inclined plane
  6. 14. Flat surface with one end higher
  7. 16. Spiral-shaped simple machine
  8. 17. Wedge for cutting food
Down
  1. 1. Machine used to separate things
  2. 2. Simple machine with wheel attached to a rod
  3. 3. What you apply when pushing, pulling, or turning
  4. 4. Playground inclined plane
  5. 6. Number of different types of simple machines
  6. 8. Wheel and axle device turned to open a door
  7. 9. Fixed point on a lever that doesn't move
  8. 10. Raised by pulleys on a boat
  9. 11. Bar moving on a fixed point
  10. 12. Tool with two levers for cutting paper
  11. 15. Simple machine with a wheel and rope/chain