The magnet draws

AIM OF THE EXPERIMENT: To show the pattern that magnetic fields form around magnets of different shapes.
MATERIALS: different magnets - a rectangular one, a round one and a horseshoe, iron filings, a paper cup, a sheet of paper. METHOD: Pour the iron filings into the paper cup
Lay the magnets on the table
Cover the magnets with the sheet of paper
Sprinkle a thin layer of iron filings onto the paper
Look at the patterns that appear
RESULTS: The filings form lines round the magnets. Heaps of filings have gathered at both ends of the long magnet.
WHY? A magnetic field is the space around a magnet in which magnetic attraction affects the movement of metal objects. Iron filings that come into it are attracted to the magnet – the closer they are, the stronger the attraction. The field of a round magnet is the same on all sides, while at the ends of a rectangular magnet it is always stronger than in the middle.

The video author's site