Simple Machines

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Across
  1. 4. a sharp end used to cut things
  2. 5. where one end is higher than the other
  3. 7. a flat place
Down
  1. 1. a stick that a wheel turns around
  2. 2. a wheel with teeth on the outside
  3. 3. a wheel with a rope around it
  4. 4. a smooth circle that rolls
  5. 6. something that help to move a heavy load