Four curling sheets
Curling is a team game played by two teams of four players each on a rectangular sheet of carefully prepared ice. While one teammate throws the granite stone towards the target, the other two team members brush the ice area ahead of the moving granite and the fourth teammate provides the direction in which the stone should be steered.

Curling is believed to have originated in Scotland around 1541. It started with people playing on icy areas, mostly frozen rivers during winter. Scottish and other European immigrants brought the game in Canada. The Royal Montreal Club is the oldest established sports club in North America and is still active to date. In the early history of curling, the rocks were simply flat-bottomed river stones that were sometimes notched or shaped; the thrower had little control over the rock, and relied more on luck than skill to win, unlike today's reliance on skill and strategy. The first world title was won by a Canadian team from Regina, Saskatchewan.

Graphical depiction of a curling sheet
According to the World Curling Federation standards, the curling sheet is an area of ice 146 to 150 feet (45 to 46 m) in length by 14 feet 6 inches (4.42 m) to 16 feet 5 inches (5.00 m) in width, carefully prepared to be as close to level as possible. Well known professional ice makers reside in Canada.

A game consists of ten rounds (ends) and is played between 2 teams. Each team consists of 4 players. One player is responsible for sliding the rock towards the target, the 2nd and 3rd players are responsible for sliding along the rock with brushes and polishing the ice surface for the moving rock. The 4th player is located on the other side of the playing area and is responsible for guiding the other players as to where the rock should land. The teams can also aim to hit the opposite team’s rock to knock it out of the round circle shown above.

If the teams are tied at the completion of ten ends, an extra end is played to break the tie. If the match is still tied after the extra end, play continues for as many ends as may be required to break the tie. The winner is the team with the highest score after all ends have been completed.

Curling Stone: a circular rock used to play the game.

Broom: Used to sweep the ice surface in front of the moving stone to lessen friction.

Other equipment includes curling pants and gloves.

1. The player throwing the rock must release it before the front edge of the curling stone reaches the near hog line (the two vertical dark lines in the picture above) and it must completely cross the far hog line; otherwise, the rock is removed from play.

2. If a moving stone is touched by the team to which it belongs, all rocks must come to a rest before the offending team may declare that the violation occurred.

3. If a rock hits the sideboard or the sidelines, it is out of play.

4. Only one team can score points for any given end. The team with the closest rock to the center scores one point. This team can score additional points for each rock that is closer to the center than their opponents’ closest rock.

5. A team can only begin to sweep the opposition's rock(s) once it has completely passed the T-line (the line that intersects the circle).

6. Only one sweeper can sweep past the T-line per rock.

Delivery: The act of throwing a rock.

Double: Removing two stones from play with one shot.

Hog: A stone that stops short of the far hog line.

Hurry: A call used by some teams to tell the sweepers to sweep quickly.

Off the Broom: A stone that is not delivered on the line of the skip's broom.

On the Broom: A shot that started out on a line toward the skip's broom.

Rink: A curling team that consists of four players: the skip, third (vice-skip), second, and lead. Also refers to the place where curling is played.

Takeout: A type of shot that removes another rock from play.