This document discusses the physical, cognitive, emotional, and social changes that occur during adolescence. Physically, adolescents experience rapid growth and development in preparation for biological reproduction. Cognitively, their brains continue maturing which allows for more advanced thinking including abstract reasoning and problem solving. Emotionally, teens face a wide range of both positive and negative feelings as they establish their identity and independence. Socially, adolescents begin relying more on peers and are influenced by their opinions as well as media like music and social media. They also start to think more about spirituality, ethics, and their role in society.