Difference between younger and older adolescents

Think about the differences between younger (around ages 12, 13, 14) and older (around age 16, 17, 18) adolescents and answer the following questions.  Your response should be about 400-500 words; points will be taken off for spelling/grammar errors.
1.  Describe one biological or physical difference between younger and older adolescents.
2.  What might be something that this biological or physical achievement makes possible for an older adolescent to do?
3.  Describe one cognitive difference between younger and older adolescents.
4.  What might be something that this cognitive achievement makes possible for an older adolescent to do?
5.  Describe one social difference between younger and older adolescents.
6.  What might be something that this social achievement makes possible for an older adolescent to do?
7.  Describe some advice you might give a younger teenager about some developments that they can anticipate as they move through adolescence.
8.  Describe some advice you might give a parent or caregiver about some developments that they can anticipate that their adolescent will achieve as they move through adolescence.