Adolescent mean age changed into both body, mind Emotional and social development, it is considered to be one of the moments of life crisis, because it is the period of childhood and adults.
Teen age represents a change to the physical, mental, emotional and social maturity is considered a critical period of life. Because the next phase of childhood and adulthood.
Teen mean ages, with transition into maturity and physical, psychological, emotional and social, it is a critical period in life. Since it is of childhood and adult.