No. In Professional Football, in order to be "down" a receiver has to be tackled or in your scenario touched by a defensive player while on the ground.
Yes. In most levels of football the receiver would be down at the point of the reception, in the NFL the receiver could get up and run if he isn't touched by a defensive player.
As of the 2007 season, no. The green dot signifies the player that has a radio receiver in his helmet and, as of the 2007 season, no defensive player is allowed to have a radio receiver in his helmet.
There is no "force out" in college football. Only one foot is required in bounds for a completed catch, unless a receiver's normal progression to the ground is interrupted by a defensive player (for example, if a receiver was hauled out of bounds when he would have landed in bounds).
Type your answer here... Dick Butkus was the greatest defensive football player
defensive football player
The NFL Defensive Player of the Year for 2010 is Troy Polamalu.
In general, interference is a deliberate act, with contact, to impede a receiver from catching a pass...or an act by a receiver to prevent defensing a pass (offensive pass interference). It is most often hitting or grabbing the receiver before the pass arrives, or a receiver shoving a defender away. If the pass has not been thrown when a defensive penalty occurs, the lesser penalty of illegal contact will apply instead. The rules are different in each level of play (high school, NCAA, NFL), as are the penalties applied.
interception
Defensive Player
The ball is not "out of bounds" unless the ball or the player who possesses it touches the ground in an out of bounds area. So in the case where the ball is in flight over the sideline, and a player who is inbounds catches it and demonstrates control before stepping out, the pass is complete.
Soccer (football) - A striker is an attacking player, and a sweeper is a defensive player who moves across the defensive line.