Sex ratio is the difference between males and females in a population. In China, sex ratio is an issue because of how favored males are. There is cases of femicide and girls are usually put up for adoption leading to an unbalanced sex ratio.
Jupiter, Saturn, Uranus, and Neptune are classified as: gas giants, outer planets, and Jovian Planets.
Answer:
The North-South split (or Rich-poor split/divide) refers to the fact that most industrialized countries are in the Northern hemisphere (think Europe and Canada/USA), while the Southern hemisphere is almost exclusively countries in development (some minor exceptions with Australia and NZ or course).
That is mostly due to the colonies established by the European countries a few centuries ago all over the world.
