Figure 22.10: These teens are good friends. Like most teens, they spend more time with
one another than they do with family members. These teens are volunteering at their local
library. What do you enjoy doing with your friends? ( 3 )
Adulthood
When is a person considered an adult? That depends. Most teens become physically mature
by the age of 16 or so. However, they are not adults in a legal sense until they are older. For
example, in the U.S., you must be 18 to vote. You must be 21 to sign legal contracts. Once
adulthood begins, it can be divided into three stages. The stages are early, middle, and late
adulthood.
Early Adulthood
Early adulthood starts at age 18 or 21. It continues until the mid-30s. During early adult-
hood, people are at their physical peak. They are also usually in good health. The ability
to reproduce is greatest during early adulthood, as well. This is the stage of life when most
people complete their education. They are likely to begin a career or take a full time job.
Many people also marry and start a family during early adulthood.
Middle Adulthood
Middle adulthood begins in the mid-30s. It continues until the mid-60s. During middle
adulthood, people start to show physical signs of aging. Their hair gradually turns gray.
Their skin develops wrinkles. The risk of health problems also increases during middle