Ice hockey is a winter sport played on an ice surface, called a rink, which has the shape of a rectangle with curved corners. The object of the game is to score more goals than the opposing team. Goals are scored by shooting a rubber disc, called a puck, into the opposing team's net. Each team has 5 players and 1 goaltender on the ice. The goaltender's main purpose is to stop the puck from entering in the net while the main purpose of the players is to score goals. The 5 players are divided into two groups: forwards and defensemen. There are three forwards and two defensemen. The three forwards are usually called a line or trio while the defensemen are said to be a pair.