Answer:
1. yes
2. Attract certain materials, such as iron, nickel, cobalt, certain steels and other alloys. Exert an attractive or repulsive force on other magnets (opposite poles attract, like poles repel).
3. No, Steel nails normally don't stick to one another. But when you touch the pole of a permanent magnet to one of the nails, the nail becomes a magnet. When this nail touches another nail, that nail becomes magnetic, and so on. The nail will stick to the bar magnet because it will become magnetized.
4. yes
5. Take two magnets put one North pole and one South pole on the middle of the iron. Draw them towards its ends, repeating the process several times. Take a steel bar, hold it vertically, and strike the end several times with a hammer, and it will become a permanent magnet.
6. Electromagnet
