Simple machines crossword puzzle

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Across
  1. 4. tool with two levers together to cut paper
  2. 6. inclined plane that is often found on a playground
  3. 7. type of simple machine made up of a bar that moves on a fixed point
  4. 8. simple machine that is made of a wheel attached to a rod
Down
  1. 1. type of simple machine that is made of a wheel with a rope or chain
  2. 2. sharp wedge used to cut food
  3. 3. wheel and axle device used to open doors
  4. 5. how many types of simple machines are there
  5. 6. simple machine that is spiral-shaped and pulls two things together