Part one of term paper
The playing field is 120-yd (110 m) long and 53.3-yd (48.8 m) wide. At each end of the 100-yd main body of the playing field, white lines called goal lines mark off the entrances to the end zones. Each team defends one end zone and must carry or pass the ball into the opponent's 10-yd (9-m) end zone to score. Lines parallel to the end zones c ...

Part two of term paper
... rubber cover. It is an extended spheroid in shape. A game of football is divided into four quarters, each consisting of 15 minutes of playing time. Between the first two quarters and the second two quarters is a rest period, usually lasting about 15 minutes. The clocks stop at the end of each quarter, when particular events occur, and when designated by the officials. Two teams of 11 players play football. Each team tries to move the ball down the field to score in the end zone defended by its opp ...