HISTORY

Football, American, distinct type of football that developed in the United States in the 19th century from soccer (association football) and rugby football. Played by professionals and amateurs (generally male college or high school teams), football is one of the most popular American sports, attracting thousands of participants and millions of spectators annually.
The forerunner of American football may have been a game played by the ancient Greeks, called harpaston. In this game there was no limit to the number of players. The object was to move a ball across a goal line by kicking, throwing, or running with it. Classical literature contains detailed accounts of the game, including its rougher elements, such as ferocious tackling.
Most modern versions of football, however, originated in England, where a form of the game was known in the 12th century. In subsequent centuries football became so popular that various English monarchs, including Edward II and Henry VI, forbade the game because it took interest away from the military sport of archery. By the middle of the 19th century football had split into two distinct entities. Still popular today, these two sports included the football association game, or soccer (the word being a slang adaptation of the three letters, s-o-c, in Association), and rugby, in which players ran with the ball and tackled. Modern football evolved out of these two sports.

football playing field and the ball---

The football playing field is rectangular in shape, measuring 100 yd (91.4 m) long and 53.5 yd (48.9 m) wide. At both ends of the 100-yard dimension, white lines called goal lines mark off the entrances to the end zones.
Each team defends one end zone. A team must carry, pass, or kick the ball into the 10-yd (9-m) end zone on the opponents' half of the field to score.
Lines parallel to the end zones cross the field at 5-yd (4.5-m) intervals. These lines give the field a resemblance to a large gridiron. Another set of lines, known as the sidelines, runs along both sides of the field.
In addition, two rows of lines, called hash marks, run parallel to the sidelines. The hash marks are 53 ft 4 in (16.3 m) from each sideline in college and high school football, and 70 ft 9 in (21.6 m) from each sideline in the National Football League (NFL). Each play must begin on or between the hash marks. Before each play, the officials place the ball either between the hash marks or on the hash mark closest to the end of the previous play.
Situated in the middle of the rear line of each end zone are goalposts, consisting of a 10-ft (3-m) vertical pole topped by a horizontal crossbar from which two vertical upright posts extend. In college and professional football, the posts are 18 ft 6 in (about 5.6 m) apart.
The football consists of an inflated rubber bladder encased in a leather or rubber cover. The ball is an extended spheroid, having a circumference of 28.5 in (72.4 cm) around the long axis and 21.25 in (54 cm) around the short axis. It weighs between 14 and 15 oz (397 and 425 g).

football playing time-------

A game of football is divided into four periods, known as quarters, each consisting of 15 minutes of playing time. The first two periods constitute the first half; the second two comprise the second half. Between the halves, a rest period, usually lasting about 15 minutes, is permitted the players, who may leave the field. The teams change halves of the field at the end of each quarter. The clocks stop at the end of each quarter and at certain other times, when particular events occur or when designated by the officials.

football players-

Football is played by two opposing teams, each fielding 11 players. Each team tries to move the ball down the field to score in the end zone defended by its opponents.
During a football game the teams are designated as the offensive team (the team in possession of the ball) and the defensive team (the team defending a goal line against the offensive team). Players involved in kicking situations are known as the special teams.
The 11 players of the offensive team are divided into two groups: 7 linemen, who play on the line of scrimmage (an imaginary line designating the position of the ball) and a backfield of 4 players, called backs, who stand in various positions behind the linemen. The lineman whose position is in the middle of the line is called the center. On his left is the left guard and on his right is the right guard. On the left of the left guard is the left tackle, and on the right of the right guard is the right tackle; similarly, on the ends of the line are the tight end and the split end. The back who usually stands directly behind the center and directs the play of the offensive team is known as the quarterback.
In a balanced backfield formation, or "T-formation," the fullback stands behind the quarterback, and the left and right halfbacks stand to either side of the fullback. Teams often use wide receivers in the place of tight ends, split ends, halfbacks, or fullbacks. Wide receivers line up on the line of scrimmage but wide of the rest of the formation.
The defensive team consists of a row of linemen, who comprise the defensive line, a row of linebackers, and a collection of defensive backs, known as the secondary. The defensive line can use any number of players, though most teams use three or four linemen. Defensive linemen principally are responsible for stopping the opposition's rushing attack and, in passing situations, putting pressure on the quarterback.
The linebackers line up behind the defensive line and, depending on the situation, are used to stop runners, pressure the quarterback, or cover the opposition's receivers. Teams usually employ three or four linebackers.
The secondary is comprised of cornerbacks, who cover wide receivers, and safeties, who cover receivers, offer support in stopping the rushing attack, and pressure the quarterback. The secondary commonly consists of two cornerbacks and two safeties.

protective equipment-

To protect themselves from the often violent bodily contact that characterizes football, players wear elaborate equipment, including lightweight plasticized padding covering the thighs, hips, shoulders, knees, and often the forearms and hands. Players also wear plastic helmets with guards that cover most of the fac

football officials-

Play is supervised by impartial officials. Professional and major college football programs use seven officials: a referee, an umpire, a linesman, a field judge, a back judge, a line judge, and a side judge. The officials carry whistles and yellow penalty flags. They blow the whistles or throw the flags to indicate that an infraction of the rules has been committed.
The referee is in charge of the game at all levels of play. The referee supervises the other officials, decides on all matters not under other officials' specific jurisdiction, and enforces penalties. The referee indicates when the ball is dead (out of play) and when it may again be put into play, and uses hand signals to indicate specific decisions and penalties.
The umpire makes decisions on questions concerning the players' equipment, their conduct, and their positioning.
The principal duty of the linesman is to mark the position of the ball at the end of each play. The linesman has assistants who measure distances gained or lost, using a device consisting of two vertical markers connected by a chain or cord 10 yd (9 m) long. The linesman must particularly watch for violations of the rule requiring players to remain in certain positions before the ball is put into play.
The field judge times the game, using a stopwatch for this purpose. In some cases, the stadium scoreboard has a clock that is considered official.

game procedures-

At the beginning of each game, the referee tosses a coin in the presence of the two team captains to determine which team kicks off or receives the kickoff. At the start of the second half, these conditions are reversed-that is, the team that kicks off in the first half receives the kickoff to start the second half.
During the kickoff, the ball is put in play by a place-kick from the kicking team's 35-yd (32-m) line, or the 30-yd (27.4-m) line in the National Football League (NFL). The NFL kickoff was moved from the 35-yd line in 1994 to increase the importance of the kickoff return. The kicking team lines up at or behind the ball, while the opponents spread out over their territory in a formation calculated to help them to catch the ball and run it back effectively. If the kick stays within the boundaries of the field, any player on the receiving team may catch the ball, or pick it up on a bounce, and run with it. As the player runs, the player may be tackled by any opponent and stopped, known as being downed. The player carrying the ball is considered downed when one knee touches the ground. Tacklers use their hands and arms to stop opponents and throw them to the ground. After the ball carrier is stopped, the referee blows a whistle to stop play and places the ball on the spot where the runner was downed. Play also stops when the ball carrier runs out of bounds. A scrimmage (action while the ball is in play) then takes place.
Before scrimmage begins, the team on offense usually gathers in a circle, called a huddle, and discusses the next play it will use to try to advance the ball. A coach either signals the play choice to the team from the sidelines, or the team's quarterback chooses from among the dozens of rehearsed plays in the team's repertoire. The defensive team also forms a huddle and discusses its next attempt to slow the offense. Each play is designated by code numbers or words, called signals. After the teams come out of their respective huddles, they line up opposite each other on the line of scrimmage. If the quarterback analyzes the defensive alignment and decides that the chosen play should be changed, the quarterback can call an audible and shout the coded directions for a new play.
Play begins when the center crouches over the ball and, on a spoken signal, snaps it-generally to the quarterback-by handing it between his legs. Based upon the chosen play, the quarterback can pass the ball, hand it off to a teammate, or run with it. During the scrimmage, the players on the offensive team may check the defenders using their bodies, but they are constrained by specific rules regarding the use of their hands or arms. The player running with the ball, however, is allowed to use an arm to ward off potential tacklers. The offensive players check defenders, or try to force them out of the way, by performing a maneuver known as blocking. Good blocking is considered a fundamental technique in football.
Perhaps the most spectacular offensive play is the forward pass, in which the ball is thrown in a forward direction to an eligible player. The ball is nearly always thrown by the quarterback, and those who may catch it include the other three backs and the two ends. A forward pass may be made only during scrimmage, and then only from behind the line of scrimmage. A lateral pass may be made anywhere on the field anytime the ball is in play.
The defending team tries to prevent the attacking team from advancing the ball. The defending players may use their arms and hands in their attempt to break through the opponents' line to reach the player with the ball. The defending team tries to keep the offense from gaining any distance, or to stop the offense for a loss by tackling the ball carrier before the ball carrier reaches the line of scrimmage. The offense must advance the ball at least 10 yards (9 m) in four tries, called downs. After each play, the teams line up again and a new scrimmage takes place. If the team on offense fails to travel 10 yards (9 m) in four downs, it must surrender the ball to its opponent after the fourth down.
A team will often punt on fourth down if it hasn't gained at least 10 yards (9 m) in its previous three tries. In punting, the kicker drops the ball and kicks it before it touches the ground. By punting, a team can send the ball farther away from its own end zone before surrendering it, thus weakening the opponent's field position.

scoring method--

The object of the game is to score more points than the opposing team within the regulation playing time. In college football, a game can end in a tie if both teams have scored the same number of points at the end of regulation time. In case of a tie in an exhibition or regular-season professional game, the teams play an overtime period, known as sudden death, in which the first team to score is declared the winner. If neither team has scored at the end of this 15-minute overtime period, then the tie is allowed to stand. In professional playoff games no ties are allowed, and the teams play until one scores.
A team scores a touchdown when one of its players carries the ball into the opposing team's end zone or catches a pass in the end zone. A touchdown is worth 6 points. After a team has scored a touchdown, it tries for an extra-point conversion. This is an opportunity to score an additional one or two points with no time elapsing off the game clock. In college football, the offensive team lines up 3 yd (2.7 m) from the goal line of the opponents and passes, kicks, or runs with the ball. A running or passing conversion in which the ball crosses the goal line counts for 2 points. A conversion by place-kick that propels the ball between the goalposts and over the crossbar counts for 1 point. In professional football, the offensive team lines up 2 yd (1.8 m) from the goal line. A conversion attempted by place-kicking the ball is worth 1 point. In 1994 the NFL introduced the running or passing 2-point conversion.
On offense, teams may also attempt to score by kicking a field goal, which counts for 3 points. A field goal is scored by means of a place-kick, in which one player holds the ball upright on the ground for a teammate to kick. For a successful field goal, the ball must be kicked between the goalposts and over the crossbar. After each field goal and extra-point conversion, the scoring team must kick off to its opponents.
Finally, a defensive team earns two points for a safety when it causes the team on offense to end a play in possession of the ball behind its own goal line. If the offensive team downs the ball behind its line intentionally, in certain situations, such as after receiving a kickoff, the play is known as a touchback and does not count in the scoring. When the offensive team suffers a safety, it must punt the ball to the opponents to restart play.

beginning of professional football

The first professional football game in the United States took place in 1895 in the town of Latrobe, Pennsylvania, between a team representing Latrobe and a team from Jeannette, Pennsylvania. In the following ten years many professional teams were formed, including the Duquesnes of Pittsburgh, Pennsylvania; the Olympics of McKeesport, Pennsylvania; the Bulldogs of Canton, Ohio; and the team of Massillon, Ohio.
Among noted college players who took up the professional game during its early years were Willie Heston (formerly at the University of Michigan), Jim Thorpe (Carlisle Institute), Knute Rockne (University of Notre Dame), and Fritz Pollard (Brown University). The professional game attracted only limited public support during its first 30 years.
The first league of professional football teams was the American Professional Football Association, formed in 1920. The admission fee was $100 per team. The teams pledged not to use any student player who still had collegiate eligibility left, as the good will of the colleges was believed to be essential to survival. The teams also agreed not to tamper with each other's players. Jim Thorpe, a player-coach for one of the teams, became president of the league during its first year.
The American Professional Football Association gave way in 1922 to the National Football League (NFL). Red Grange, the famous halfback from the University of Illinois, provided a tremendous stimulus for the league when he joined the Chicago Bears in 1925 and toured the United States that year and the next. His exciting play drew large crowds. Thereafter, professional football attracted larger numbers of first-rate college players, and the increased patronage made the league economically viable. Strategically, the early NFL game was hardly distinguishable from college football at that time. There was no attempt to break away from collegiate playbooks or rule books.
For 13 years the NFL followed the National Collegiate Athletic Association (NCAA) Rules Committee recommendations. In the league's early years, players considered the low-paying NFL a part-time job and held other jobs during the day. Thus, while college coaches could drill their players daily for hours, professional football coaches arranged practices in the evenings, sometimes only three or four times a week.

professional football today-

The present-day NFL game is immensely popular. It is played during the late summer, through autumn, and into January. Professional teams play 4 exhibition games before the start of the regular season, followed by 16 games in the regular season and then playoff games, when they qualify for the playoffs. Teams play one game each week, using the time between games to recover, practice, and prepare for the next game. Each team receives one week without a game, known as a bye, during the season.
The NFL is a big business for players, owners, advertisers, and other industries tied to the sport. NFL franchises generate huge revenues for host cities, in addition to promoting civic pride and national exposure. Thus, cities often compete for teams, offering prospective teams bigger and better stadiums, guaranteed fan support, and various economic incentives.
In the 1980s three NFL teams relocated: the Raiders moved from Oakland, California, to Los Angeles in 1982; the Colts moved from Baltimore, Maryland, to Indianapolis, Indiana, in 1984; and the Cardinals moved from Saint Louis, Missouri, to Phoenix, Arizona, in 1988. Other teams have agreed to stay only with the promise of new facilities by their host cities.
Throughout the years, other consortiums have sought to capitalize on the economic potential of the sport. For three years in the 1980s a new professional spring league, the United States Football League (USFL), competed with the NFL. The NFL lost players to the USFL, and NFL teams had to pay higher salaries to keep other players from leaving. However, the USFL soon folded, with much of its more talented personnel entering the NFL.

SOCCER RULES

1. No using hands, except for goalie. 2. No pushing or shoving other players.3. No talking rudely to the referee, or other players.4. No tugging on bottom of shirts
5. You have to have somebody in-between you and the other goalie if someone is going to pass the ball to you (offside).6. Only eleven people on the field at one time.7. Your shirt has to be tucked in your shorts at all times.8. You are not allowed to push or trip other people on purpose.9. No tackling the goalie, if he/she has the ball.

1. Have a good attitude2. Don't hog the ball3. When shooting the ball, try to fake out the goalie 4. Try to pass a lot5. Don't kick the ball too hard, unless shooting6. Don't stare at the ball while your dribbling 7. Believe in yourself and others8. Cooperate with your teammates 9. Don't yell at the referee10. Just have fun