The point at which a child becomes an adolescent is defined by the onset of puberty or by the beginning of the teenage stage. Adolescence is also viewed as ending with the teenage stage. However, in some individuals (particularly females), puberty begins in the preadolescence years.
Grundy County, Illinois. Grundy County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 50,063. Its county seat is Morris. Grundy County is part of the Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area.
Terminal moraines, such as this one in central Kendall County, rise dramatically from the surrounding plain. Kendall County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 114,736. Its county seat is Yorkville, and its most populous municipality is Oswego. Kendall County is included in the Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area.