science crossword

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Across
  1. 1. a piece of wood or metal used to separate objects
  2. 3. used to lift heavy objects
  3. 4. a sloped surface
  4. 5. makes a tough job easier
  5. 7. an inclined plane wrapped around a cylinder
Down
  1. 1. used to make cars roll
  2. 2. consists of 2 or more simple machines
  3. 6. a machine consisting of a beam or rigid rod pivoted at a fulcrum