YES
According to the 2009/2010 version of the Laws of the Game as regulated by F.I.F.A., under Law 8- The Start and Restart of Play (page 27 in the official "Laws of the Game") under the heading "Kick-off" it states:
"A goal may be scored directly from the kick-off."
You may verify my answer by going to www.fifa.com and download the Laws of the Game pdf file.
Yes you totally can do that.
You are not allowed to score in soccer by your fist
Yes. A player may score directly from a kickoff, goal kick, corner kick, direct free kick, or dropped ball. A player may not score directly from an indirect free kick or throw-in.
No you can not score from a throw in.
Yes, you can score from inside the goalie box in soccer.
Yes, it is allowed to score a direct shot in soccer.
Yes. Any player on the pitch can score in soccer including goalkeepers.
It has to touch a player in order for it to be counted as a goal.
When a goal is scored off a throw in
You try to score goals, they have positions, if it goes out from the side its a throw in, if it goes out behind the goals and the defense did it, its a corner kick, and if the offense did it then it's a goal kick.
a goal in soccer is to "score a goal"
Yes, it is allowed to score a direct goal from the kickoff in soccer.
In soccer, a defense can score by kicking the ball into their own team's goal, known as an own goal.