Culture refers to the beliefs, values, and behaviors that are shared by a group of people and passed down between generations. There are two main types of culture - material culture, which includes objects like clothing and tools, and nonmaterial or symbolic culture, which is a group's way of thinking and patterns of behavior. Symbolic culture includes symbols, language, values, norms, and other elements that people use to communicate and understand the world. When exposed to an unfamiliar culture, people may experience culture shock as they can no longer rely on their own cultural assumptions.