force - push or pull, energy - ability to do work , iron - most common magnetic metal, repel - push away , iron and nickel - earth's core is made of...., moving electrons - magnetism comes from...., earth's spinning - earth's magnetic field is formed from..., reflection of sunlight - the northern lights are caused by...., the sun's magnetic field - sunspots are caused by...., detection of magnetism - dolphins and some birds navigate by....,

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