Adolescence refers to the period between childhood and adulthood from ages 10 to 20. During this time, adolescents experience significant physical, mental, and social changes. Physically, their bodies mature sexually through puberty and growth spurts. Mentally, they develop an identity, abstract thinking skills, and future goals. Socially, peer relationships gain importance and they seek independence from family. Some issues that can arise include mood disorders, risky behaviors, and adjustment to physical changes.