A ____ is an object that produces a magnetic field. The field is most powerful at the ends or ____ of the magnet. Magnets can have many different shapes. The ____ magnet is the strongest shape for a magnet because the poles point in the same direction. The ____ magnet is the weakest because the oles are the farthest apart. The magnetic ____ is invisible. We can visualize the field as magnetic field lines. Magnets have a ____ and ____ pole, and the magnetic field lines run from north to south. Magnetic field lines will never cross. A magnet can attract and repel other magnetic objects. ____ means to "push away". ____ means to "pull closer". ____ poles repel each other and ____ poles attract each other. Magnets are usually manufactured from a mixture of ____ and other metals. A ____ magnet is designed to remain magnetic for a long time, like a refrigerator magnet. A bar magnet is also a permanent magnet.

Magnetism

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