energy&its forms

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Across
  1. 2. special type of gear that has its ratio measured by the angle of threads
  2. 4. measurement used to measure work
  3. 5. machine that uses a combination of axle and lever like a bucket out of a well
  4. 7. the ability to do work
  5. 8. makes it easier to pull a wagon uphill
  6. 12. the fact that energy can never be created or destroyed is called the law of ____________.
  7. 13. type of energy that is stored in a battery
  8. 14. when a force that moves an object a certain distance
  9. 15. visible energy is called
Down
  1. 1. when we measure how much work something can do in a certain amount of time
  2. 3. tool that allows us to use force in a convenient way
  3. 6. when 2 gears are connected by a chain and the larger gear turns once while the smaller one turns two or more times
  4. 9. type of energy that is stored and does NOT move
  5. 10. type of plane that are ramps, screws, winding uphill roads
  6. 11. simple machine that uses a fulcrum