why teens are always seem angry

Every one has to pass through different stages in life ,like baby, teen age, middle age, Old age etc. The Generation Gap is defenitly there when a baby cries without reasons, or a teen spontanoiusly become virulant, Middle men sees everything seriously and shows much temperaments, Old people sat quitely and spent time thinking like Einstien.
So let them act their part in their appropriate stages and reach their maturity at least before they perish.