<p><strong>Fig. 8.12.</strong> (<strong>A</strong>) Magnetize a needle by rubbing its tip against a magnet. (<strong>B</strong>) Float the magnetized needle in a cup of water after sticking it through a piece of Styrofoam.</p>

Fig. 8.12. (A) Magnetize a needle by rubbing its tip against a magnet. (B) Float the magnetized needle in a cup of water after sticking it through a piece of Styrofoam.

Image by Byron Inouye