1
the natural magnet was discovered more than ………years ago
2
the natural magnet is made of one of iron ores called …….
3
magnets are divided into ……. Types
4
all of the following materials are attached to the magnet except………
5
all of the following materials are not attracted to the magnet except………….
6
if you put a magnet near a magnetic material,it will
8
the similar magnetic poles ……….each other
9
the dislike magnetic poles ……….. each other
10
the most attraction force of the magnet exists ………
