Australia is an island, a country and a continent and it is the sixth-largest country in the world surrounded by the Indian and Pacific oceans. Because of the continent's great age, extremely variable weather patterns, and long-term geographic isolation results in unique and diverse country in every way - in culture, population, climate, geography, history, biology and landscape. It is one of the highly developed country and one of the wealthiest in the world. Australia ranks high in many international comparisons of national performance, such as quality of life, health, education, economic freedom, and the protection of civil liberties and political rights. Aussie is a common term for "Australian". Australia is multicultural and multiracial and it reflected in the country's food, lifestyle and cultural practices. It has an important heritage because of the indigenous population. The population diversity influences and creates a cultural environment that is lively, energised, innovative and outward looking.