it is the same magnetism which causes the north pole to attract and the south pole to repel its upper end, because the magnetic conditions of the earth's two poles are opposite.
(it; is; the same magnetism which causes the north pole to attract and the south pole to repel its upper end,) (the magnetic conditions of the earth's two poles; are; opposite) (the same magnetism; causes; the north pole to attract and the south pole to repel its upper end) Context(the same magnetism causes,List([6, 37))):(the north pole; to attract; )
the same magnetism causes,List([6, 37))
it the magnetic conditions of the earth's two poles the same magnetism the north pole
is are causes to attract
the same magnetism which causes the north pole to attract and the south pole to repel its upper end,
opposite
the north pole to attract and the south pole to repel its upper end