How will you convert an iron nail into a magnet?

How will you find the poles of an oddly-shaped magnet?

You can find out which direction to walk in using the North Star as a guide. What advantages does a magnetic compass have over this method?

List at least 10 situations where magnets can be used for sorting or lifting things (example – for picking up sewing needles dropped on the floor without hurting yourself).

Take two toy plastic cars C1 and C2. Stick strong bar magnets on the roofs of C1 and C2. The north pole of the magnet on C1 should point to the front of the car, and the north pole of the magnet on C2 should point to the back of the car. Bring C1 near C2. What happens if the magnets are strong?