Being in front of the ball before the kicker kicks the kickoff

Enroachment

A foul in which a defender makes contact with a member of the offense before the snap.

Touchdown

is made when the offense moves the ball over the opponents goal line by either running it or passing it.  

Six points is scored.

is scored after a touchdown by passing or running the ball over the goal line from the 3 yard conversion line.  

Two points is scored

when the ball, legally in the possession of a player becomes dead behind their own goal line.  

Two points are scored

a field goal is scored when the ball is kicked through he goal posts instead of scoring a touchdown.  

Three points are scored. 

When the ball is sent out of bounds over the end line or the crossbar by a member of the defense

ball is kicked on the nearest corner by the offense

is taken by the defense when the ball is kicked over the end line or over the crossbar by the attacking team.

Penalty Kick

is given when the defending player commits a foul in the penalty area.

is given to a team when the opposing team commits a more serious foul; a goal may be scored directly from this kick.

Awarded to the team against whom the violation was committed, must be touched by a player other than the kicker before the goal can be scored.