Magnetometer in a Soda Bottle

Solar storms can affect the Earth’s magnetic field causing small changes in its direction at the surface which are called magnetic storms. A magnetometer operates like a sensitive compass and senses these slight changes. The soda bottle magnetometer is a simple device that can be built for under $5.00 which will let students monitor these changes in the magnetic field that occur inside the classroom. When magnetic storms occur, you will see the direction that the magnet points change by several degrees within a few hours, and then return to its normal orientation pointing towards the magnetic north pole.


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