Energy

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Across
  1. 2. an electrical machine that converts electrical energy into mechanical energy
  2. 4. any substance that has a defined composition
  3. 7. a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices
  4. 8. an affair or situation under consideration; a topic
  5. 9. a person who directs the performance of an orchestra or choir
  6. 11. a form of energy resulting from the existence of charged particles
  7. 13. metal in the form of a usually very flexible thread or slender rod
  8. 14. a minute portion of matter
  9. 15. a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices
Down
  1. 1. a change or development
  2. 3. a length of something wound or arranged in a spiral or sequence of rings
  3. 5. a price asked for goods or services
  4. 6. exhibiting or relating to magnetism
  5. 10. a particle of matter that uniquely defines a chemical element
  6. 12. a subatomic particle with a negative one elementary electric charge