science crossword

1234567
Across
  1. 2. consists of 2 or more simple machines
  2. 6. axle used to make cars roll
  3. 7. makes a tough job easier
Down
  1. 1. a machine consisting of a beam or rigid rod pivoted at a fulcrum
  2. 3. a sloped surface
  3. 4. used to lift heavy objects
  4. 5. a piece of wood or metal used to separate objects
  5. 7. an inclined plane wrapped around a cylinder