There are dozens of shooting sports, if not hundreds, Obviously the rules will differ, there is not "an answer" to this question, there are too many to list. You need to be specific.
The only consistent rules are safety rules:
1) All guns are always loaded, and must always be treated as such each time they are handled.
2) Keep your finger off the trigger until you are ready to shoot.
3) Never point your muzzle at anything you are not willing to destroy.
4) Always be aware of your target and anything that is behind it - you are responsible for every bullet that leaves your gun.
Shooting became a sport when the NRA was formed in the 1800's
Well usually any sport that involves shooting like clay pigeon shooting.
shooting
Yes, it is.
yes
That depends. It really depends on when they child is capable of understanding the safety rules and safely handle a firearm. The basics of saety should be taught as early as possible but most do not begin shooting until between the ages of 5 and 10.
People shooting
Shooting/hunting.
shooter
shooting
shooting started in 1950 when the badminton started
Biathlon consists of rifle shooting and cross country skiing. It would be a winter sport and there is competition in biathlon at the Winter Olympic Games. But, there are some biathlons that are on roller skis, but these are mostly training, and aren't really a sport.