Test: Electricity and Magnetism of the Earth

the correct answer should be: all of the above

the correct answer should be: Theory of Relativity

the correct answer should be: electromagnetic induction

the correct answer should be: Thales of Melitus

the correct answer should be: invisible

the correct answer should be: attracts or repels other objects

the correct answer should be: ferromagnetic

the correct answer should be: north and south poles

the correct answer should be: is a giant electromagnet

the correct answer should be: geomagnetic field