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A standard football game consists of four 15-minute quarters (12-minute quarters in high-school football and often shorter at lower levels, usually one minute per grade [e.g. 9-minute quarters for freshman games]), [6] with a 12-minute half-time intermission (30 minutes in the Super Bowl) after the second quarter in the NFL (college halftimes are 20 minutes; in high school the interval is 15 ...
Teams change ends of the field at the end of the first quarter and the end of the third quarter, though the situation on the field regarding possession, downs remaining, and distance-to-goal does not change (so a team with possession 5 yards from the opponent's end zone at the end of the first quarter would resume playing 5 yards from the end ...
See Illegal participation, the equivalent foul in American football Too many men in formation — — — — — See Illegal substitution, the equivalent foul in American football Tripping A player trips another player with the lower leg. One foot kicks the ankle of the other leg from behind 10 yards, automatic first down if committed by defense.
The NFL rule is the same as in the college game for the first half of games, but the clock restarts upon the snap when there is under 5:00 left in the 4th quarter/overtime. In high school football, the clock starts on the snap the entire game. A loose ball is out of bounds. The clock is restarted when a ball is returned to the field in the NFL.
American football rules allow each team to have three timeouts in each half, and the NCAA, NFL & Texas high school football stops play for a "two-minute warning". Before 2024, NCAA football had no two-minute warning, so the clock stopped on a first down until the ball is ready for play if the play ended in the field of play.
A fumbled ball may be recovered and advanced by either team (except, in American football, after the two-minute warning in either half/overtime or on 4th down at any point during the game, when the fumbler is the only offensive player allowed to advance the ball, otherwise the ball is ruled dead at the spot of the fumble, except when it is ...
In American football, a safety is scored when any of the following conditions occur: [4] [5] [6] The ball carrier is tackled or forced out of bounds in his own end zone. The ball becomes dead in the end zone, with the exception of an incomplete forward pass, and the defending team is responsible for it being there.
[9] John Heisman was instrumental in the rules' acceptance. In Canadian football, the first exhibition game using a forward pass was held on November 5, 1921, at McGill University in Montreal, Quebec, Canada, between the McGill Redmen football team and visiting American college football team the Syracuse Orangemen from Syracuse University.