What is the different between amateur and professional sports?

Answer 1

A amateur has less experience and is not as good as a pro

While this is a good description of the meaning of the words "amateur" and "professional," but in sports it's often a matter of whether or not the player is getting paid for participating in the sport. It used to be that professional sports players could not play in the Olympics, only amateurs. College Basketball players would be amateurs, NBA and WNBA players are professionals. It was felt that some countries' amateurs (primarily capitalist countries) were at a disadvantage to players whose countries (primarily communist countries) supported amateurs. In 1986 this changed, some sports allow professionals. It's up to the International Olympic Committee.

see the forum for the pbs newshour for the july96/olympics_7-23.html

Answer 2

Professional Sports are mainly broadcasted all over the world where as amateur sports are barely broadcasted.

That is partially true, but the main reson is that pros get paid!