Magnets, Electricity and other things of the such

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Across
  1. 5. A circuit with one path. Everything attached to the circuit is turned on and off at the same time.
  2. 6. Magnetic metal that starts with N.
  3. 7. The flow of electrical energy.
  4. 9. Something that electricity can easily flow through.
Down
  1. 1. A circuit in which can can choose what to activate and what not to activate.
  2. 2. Something that electricity can't easily flow through.
  3. 3. Something that converts chemical energy to electrical energy.
  4. 4. A closed path that allows electricity to flow.
  5. 6. The direction a compass always points in.
  6. 8. The amount of poles a magnet has.