8th grade chpt 11 Magnetism

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Across
  1. 5. the relationship between electric current and magnetism
  2. 7. metal that bends when it gets hot from too much current flowing through the wire
  3. 9. he produced an electric current in a wire and saw it changed a compass’ needle
  4. 13. he found that Earth acts like a giant magnet
  5. 16. a device that transforms mechanical energy into electrical energy
  6. 17. if you ___ the amount of current in a wire it will ___ the strength of the current flowing through
  7. 19. you can increase or decrease the number of ___ in a wire to change the strength of the current
  8. 22. a magnetic field spreads out from the ___ pole of the magnet, curves around and returns to the other pole
  9. 23. a solenoid with a ferro-magnetic core
  10. 25. this transformer is when the primary wire has more coils than the secondary
  11. 26. when allowed to swing freely, one end of a bar magnet will always point ___ and the other end ___
  12. 28. a positive pull of magnets toward each other
  13. 29. the attraction or repulsion of magnetic materials is called this
  14. 30. this charge comes from protons and electrons
  15. 32. a device that increases or decreases voltage
  16. 35. the ___ poles of magnets attract each other
  17. 36. a magnetic field produced by a current has a ___ and a direction
  18. 37. the attraction or repulsion between magnetic poles
  19. 39. materials in which electrons do not move easily
  20. 41. a devise that measures small currents
  21. 44. As Earth’s magnetic poles move, the magnetic declination in a given location will ____
  22. 46. these poles are the ones where Earth’s has its greatest magnetic force
  23. 47. this is a coil of wire with a current
Down
  1. 1. the area of a magnet’s force around a magnet
  2. 2. states that electric charges cannot be made or destroyed only transferred from object to object
  3. 3. tendency of a material to oppose the flow of electrons in a current
  4. 4. the ability to move an object over a distance
  5. 6. this is caused by an accumulation of excess electric charges on an object
  6. 8. this type of current flows in one direction
  7. 10. the type of current produced by a battery is ___ current
  8. 11. this type of current can change direction
  9. 12. the ___ ends of two magnets will repel each other
  10. 14. when magnets push away from each other
  11. 15. materials in which electrons move easily
  12. 18. when an electric current flows through a wire, a ___ ___ forms
  13. 20. this has a magnet on a needle that spins freely and always points north
  14. 21. in a solenoid, the two ends act like the poles of a ___, but the N and S poles can change direction if the current changes direction
  15. 24. magnetic ____ is the angle between geographic North pole and magnetic North pole
  16. 27. his law states that current in a circuit equals the voltage difference divided by the resistance
  17. 31. this is the place on Earth we consider the poles when looking at Earth’s Geography
  18. 33. this transformer is when the primary wore has less coils than the secondary
  19. 34. moving magnets close or apart produces ___
  20. 38. a net movement of charges in a single direction through a wire or conductor is an electric ____
  21. 40. magnets have 2 ends, or ____
  22. 42. any material that attracts iron and materials that contain iron
  23. 43. magnets can interact ___ even touching
  24. 45. an electric ___ transforms electric current into mechanical energy