A Formula 1 season consists of a series of races, known as Grands Prix, which take place worldwide on both purpose-built circuits and street circuits (closed public roads). Formula 1 has a competition structure that involves 10 teams, with two drivers per team. A points system is used to determine two annual World Championships: one for a driver, the other for a constructor (constructors in F1 are the companies, entities or manufacturers that are responsible for developing and constructing the cars used for racing – for example, Ferrari).