Same way as infants with water poured over head. Some churches will do full immersion, where the adult enters a pool knee to waist deep and their full body is dunked.
You don't have to be a certain age for baptism, babies to elderly people get baptised
The practice of baptism varies among different denominations in terms of the method of baptism (immersion, pouring, or sprinkling), the age at which it is performed (infant or adult), and the significance attached to the act (symbolic or necessary for salvation).
You can be any age at baptism. Mostly it is babies that are baptised, but it can be children or adults who are baptised too. So there is no set age for baptism.
usely you have to be a baby in age in between 2 mothers to 3 years old but some people get baptism when they are 9 or 1o
Anabaptists.
Anabaptist
Anabaptists
Baptists
An adult baptism is different because, in a babies baptism the godparents and parents make the commitment to Christ in adult baptism, the participant says the words. Also in adult baptism, the parents don't come up, a sponsor goes up with the participant.
any age
A person who rejects infant baptism and believes in adult baptism through immersion could be practicing Anabaptism. Anabaptists typically emphasize nonviolence, separation of church and state, and voluntary church membership.
Baptism is receiving the Holy Spirit into your life. Catholics have their babies baptized at a very early age,,, other religions wait till a child is older.