Simple machines

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Across
  1. 3. A tool that combines two levers and two wedges to cut paper.
  2. 5. A sharp wedge used in the kitchen to slice food.
  3. 6. You turn this wheel-and-axle to open a room.
  4. 8. A heavy wedge used to chop wood or split logs.
  5. 9. A tool that uses a lever action to help you pull a stubborn nail out of wood.
Down
  1. 1. While it is mostly electrical, its base is a screw that twists into a socket.
  2. 2. A complex machine that uses pedals, chains, and wheels to help you travel.
  3. 3. A lever in the park that goes up and down with a friend.
  4. 4. A playground inclined plane that uses gravity to get you to the bottom.
  5. 7. A slanted surface that acts as an inclined plane to help you move heavy loads.