China Jack

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Across
  1. 3. the amount of energy used as a force moves an object over a distance.
  2. 6. An inclined plane wrapped around a cylinder that moves.
  3. 8. The conversion of one form of energy to another.
  4. 9. machines that do work using one movement.
  5. 12. a flat, level surface.
Down
  1. 1. energy can be transformed from one region to another but energy cannot be created or destroyed.
  2. 2. a flat sloped plane.
  3. 4. To change a thing into a different thing.
  4. 5. Two or more simple machines working together.
  5. 7. A simple machine that pivots around a fixed point.
  6. 10. It is a grooved wheel with a rope or cable wrapped around it.
  7. 11. the ratio of output work to input work.