Simple machines

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Across
  1. 2. many people use it to go up and down
  2. 3. Pulleys are used to raise a flag up this tall object
  3. 5. helps you to tell the time
  4. 7. type of simple machine that is spiral-shaped
  5. 9. used to sharpen a pencil
  6. 11. we use it to drive and turn a car
  7. 13. The oars on a boat are a...
Down
  1. 1. wheel and axle device that is used to open a door
  2. 4. pulley and lever together, used to catch fish
  3. 6. machine used to open bottles
  4. 7. inclined plane that is often found on a playground
  5. 8. wedge used for cutting food
  6. 9. type of simple machine that uses a rope and wheel
  7. 10. number of different types of simple machines
  8. 12. wedge used for chopping wood