energy

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Across
  1. 3. is the process which fuel burns because it combines rapidly
  2. 4. effeciency- an expression of how much of the energy put into a system actually does useful woork
  3. 6. which is energy made available by the flow of an electric charge
  4. 8. energy- Nearly always available somewhere on earth
Down
  1. 1. in contrast cannot be replaced
  2. 2. energy- is the enrgy that an object hasdue to it's motion
  3. 5. energy- energy that an object has due to it's position or shape
  4. 7. is the ability to do your work or cause change