1. The island continent of Australasia consists of Australia, Tasmania, and New Zealand. It is located in the southern hemisphere and surrounded by the Indian and Pacific Oceans. 2. Major geographic features include the Great Dividing Range, the Great Barrier Reef, and varied climates ranging from tropical in the north to cool temperate in the south. 3. The population is concentrated along the coasts and includes Aboriginal Australians as well as more recent European immigrants. Major cities include Sydney and Melbourne.