How does the confederation cup differ from the world cup?

Answer 1

The FIFA Confederations Cup is anassociation football tournament for national teams, currently held every four years by FIFA. It is contested by the winners of each of the six FIFA confederation championships (CAF,CONMEBOL, UEFA, AFC,OFC, CONCACAF), along with the FIFA World Cup winner and the host nation, to bring the number of teams up to eight.

The FIFA World Cup (also called the Football World Cup, the Soccer World Cup, or simply the World Cup) is an international association football competition contested by the senior men's national teams of the members of Fédération Internationale de Football Association (FIFA), the sport's global governing body. The championship has been awarded every four years since the inaugural tournament in 1930, except in 1942 and 1946 when it was not held because of the Second World War. The current champions are Spain, who won the 2010 tournament, and will defend their title, subject to qualification, at the next tournament, to be held in Brazil.

The current format of the tournament involves 32 teams competing for the title at venues within the host nation(s) over a period of about a month - this phase is often called the World Cup Finals. A qualification phase, which currently takes place over the preceding three years, is used to determine which teams qualify for the tournament together with the host nation(s).

Source = Wikipedia