Core Science

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Across
  1. 3. the rate at which energy is transferred.
  2. 4. Materials that are attracted to a magnet.
  3. 13. the force that pulls things together.
  4. 15. the force that pushes things away from each other.
  5. 17. The area around a magnet where its magnetic force can be felt.
Down
  1. 1. a place where the high voltage electricity from the national grid is reduced by transformers.
  2. 2. The unit of electrical energy.
  3. 5. a current that constantly changes direction.
  4. 6. a device that increases or decreases the voltage of alternating current.
  5. 7. An electromagnetic device that cuts off the electrical supply, if the current is too large.
  6. 8. the non-contact force of a magnetic field.
  7. 9. a machine that converts kinetic energy into electrical energy by induction.
  8. 10. this safety wire connects the metal case of an appliance.
  9. 11. a magnet made by passing electricity through a coil of wire.
  10. 12. the unit of power.
  11. 14. a current that always flows in the same direction.
  12. 16. the parts of a magnet where its magnetic field is strongest.
  13. 17. an object that has a magnetic field and can attract magnetic materials.
  14. 18. generating a current in a wire by moving the wire in a magnetic field, or by moving a magnet inside a coil of wire.
  15. 19. a length of wire that heats up and melts. If the current is too large, and so cuts off the electrical supply.