100 Days Project

Nanogirl: Star Science

Nanogirl wants to find 100 friends to do science experiments with her to prove that no matter who you are or what your education level, you can always have fun with science.

Day 22:

10 year old Sîan magnetises a screwdriver with some added magic of her own :)

Sîan is 10 and wanted to show me her own experiment where she magnetises a screwdriver with enough strength to pick up a nail.

First she started with a normal screwdriver and held it close to a box of nails, but nothing happened.  Then she took a magnet and ran it along the tip of her screwdriver several times in the same direction, this process is called magnetisation.  Some materials such as iron and steel contain magnetic domains which are clusters of atoms that act as tiny magnets.  By stroking the screwdriver with a magnet, Sîan is causing all of the domains to line up in a definite pattern with all the north poles pointing in one direction and the south poles in the other direction.  This creates a temporary magnetic field and Sîan shows this by holding the screwdriver over the same box of nails and now it attracts one and she can pick it up using only the power of magnetism!

Sîan also used her magical powers to strengthen the screwdriver magnet by running around the garden with it - NanoGirl highly approves of using your own magical powers to help with your science experiments :)