Football is a team sport in which players try to move a ball into the opponent’s end zone. The goal is to score a touchdown, which nets six points.
The game is played on a football field, which is about 100 yards long and 160 feet wide. Each team has its own 10-yard end zone.
A quarterback, running back and receivers are the players who play in the offense. The offense tries to advance the ball to the other team’s end zone by passing it, rushing or kicking it.
There are four different periods of the game, called quarters. Each period begins when the ball is snapped. The offense has a limited amount of time to run between plays.
The offensive team is given a certain number of downs, which are the number of times it can advance the ball by 10 yards. If the offense fails to advance the ball by 10 yards in three downs, it loses the possession of the ball.
Players on the defensive side try to block the opposing offense’s progress by tackling them or preventing them from passing the ball. When a player makes an interception, he can run with the ball until he is tackled or out of bounds.
Once the ball is in the opponent’s end zone, the offense is awarded an extra point. This is similar to an extra point in rugby. In the NFL, the team attempting the conversion is positioned at the 2-yard line.