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Across
  1. 4. The movement of electricity over long distances through high-voltage power lines.
  2. 6. Electricity that changes direction 60 times per second in the United States.
  3. 9. The highest level of electricity demand that occurs during periods of heavy use.
  4. 10. A device that converts mechanical energy into electrical energy.
  5. 11. A machine with blades that spins when pushed by steam, water, or wind to produce mechanical energy.
  6. 12. The network of power plants, transformers, and transmission lines that delivers electricity.
Down
  1. 1. Electricity that flows in only one direction, commonly used in batteries.
  2. 2. The minimum amount of electricity demand that must be supplied continuously.
  3. 3. The electrical pressure that pushes current through wires.
  4. 5. The high-pressure gas produced by heating water that spins turbines in most power plants.
  5. 7. The percentage of input energy that is converted into useful electrical energy.
  6. 8. A device that increases or decreases voltage in the electrical system.