Sports and vocabulary

Which sport's ball is this?

What is the name of this sport?

someone who behaves in a noisy or violent way at a football match

someone who makes sure that the rules of a sport such as football are followed

What is the third most famous sport in the world?

"a group of people who play a game or sport together against another group"

which one of these are not played indoors?

determined or trying very hard to be more successful than other people or businesses =

What is this sport?

a board on which the points won in a game are recorded

Which one of them is not an extreme sport?

If you have these, you are about to go...