Simple Machines

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Across
  1. 4. _____ is a type of slope that makes it easier to lift something.
  2. 6. Machines make our _____ easier.
Down
  1. 1. _____ help us to do work.
  2. 2. a pulley is made from wheel and ______.
  3. 3. some machines increase the _____ of work.
  4. 5. a weight balance is a type of ______.