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1. why are the poles of a magnet called north and south poles?
a. one pole is positive and one pole is negative.
b. the poles are at opposite ends of the magnet.
c. the poles are the coldest parts of the magnet.
d. the poles line up with earth's north-south axis.
2. what happens if you cut a bar magnet in half between the north and sou
a. one half has a north pole and one half has a south pole.
b. each half is a stronger magnet than the original magnet.
c. each half has both a north pole and a south pole.
d. the two halves are no longer magnetic.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.