This is like a trial in adult court. The judge hears testimony and evidence is provided. There is no jury in a juvenile proceeding.
Juvenile court does not find a juvenile defendant 'guilty' but the judge 'adjudicates' the juvenile 'delinquent'. Adult criminals are found guilty, which carries with it punishment. Juveniles are not punished for being adjudicated delinquent; they are provided 'treatment'. This is based on the principal that we must nurture and help our children to become productive citizens.