1. Unlike poles attract each other.   True   False   2. An iron nail is suspended vertically from a string. When a strong bar magnet is brought close to it, the iron nail is attracted to the magnet and the string assumes an inclined position. If an iron sheet is placed between the iron nail and the magnet, the string will _______.   return to its vertical position   remain in an inclined position   3. Name the magnetic iron ore once used as a primitive compass.   Lodestone   Soft Iron   Keeper   Hint Half-n-half Clue   4. Temporary magnets are made of _______.   soft iron   steel   copper   Half-n-half Clue   5. The imaginary line NS passing through the magnetic north and south poles of a bar magnet is called the   magnetic axis   magnetic meridian   magnetic equator   Half-n-half Clue   6. The distance between the magnetic north pole and magnetic south pole of a bar magnet is called the   length of magnet   equatorial axis   effective length   Half-n-half Clue   7. Most of the magnetic power appears to be concentrated at certain points of a magnet. These points are called _______.   poles   keepers   inductors   Half-n-half Clue