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Australia is a country that is considered a continent by most geographers. It is surrounded by the Indian and Pacific Oceans and is separated from Asia by the Arafura and Timor Seas. Australia is the smallest continent and one of the largest countries on Earth, covering about 3 million square miles. It is comprised of the mainland Australian continent, the island of Tasmania, numerous smaller offshore islands, and several remote offshore territories. Australia is sometimes referred to as an island continent due to its size and the fact that it lies on its own tectonic plate, separate from other continents. However, the definition of an island is typically a mass of land that is 'entirely surrounded by water' and 'smaller than a continent', which would exclude Australia from being classified as an island.
| Characteristics | Values |
|---|---|
| Continent | Australia |
| Land Area | 7,688,287 km2 (2,968,464 sq mi) or 7.7 million square km (3 million sq mi) |
| Population | 250,000 to 500,000 Aboriginals at the time of European settlement; currently the sixth-largest country in the world by population |
| Indigenous People | Aboriginal Australians, including Torres Strait Islanders |
| Flora and Fauna | Unique flora and fauna, including kangaroos, wombats, and Tasmanian devils |
| Geological Distinction | Australia sits on its own tectonic plate, the Australian Plate |
| Biological Distinction | A large percentage of Australia's plant and animal species are found nowhere else in the world |
| Anthropological Distinction | Aboriginal people are limited to Australia |
| Cultural Distinction | More "Western" in ideology than most other countries in the South Pacific region |
| Mainland | The Australian mainland is relatively flat, with an average height of 325 metres (1,066 ft) |
| Islands | Includes the island of Tasmania and numerous smaller offshore islands, such as Norfolk Island, the Cocos (Keeling) Islands, and Christmas Island |
| Territories | External territories include the Australian Antarctic Territory, Norfolk Island, the Cocos (Keeling) Islands, Christmas Island, and more |
| Economic Zone | Exclusive economic zone of 8,148,250 square kilometres (3,146,060 sq mi), not including the Australian Antarctic Territory |
| Climate | Australia is the world's driest inhabited continent, with a variety of landscapes and climates including deserts and tropical rainforests |
| Coastline | 35,877 km (22,293 mi) of coastline, excluding offshore islands |
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What You'll Learn
Australia is the smallest continent
Australia is sometimes referred to as an "island continent" because it is both a country and a continent by itself. However, it is not technically an island as it does not meet the definition of an island, which is any mass of land that is entirely surrounded by water but is smaller than a continent. Australia is also much larger than Greenland, which is considered the largest island in the world.
There are several distinctions that qualify Australia as a continent rather than an island. Firstly, Australia lies on its own tectonic plate called the Australian Plate, whereas Greenland shares the North American continental plate. Secondly, there is a biological distinction. Australia has a large percentage of plant and animal species that are unique to the continent, such as kangaroos, wombats, and Tasmanian devils. In contrast, fewer of Greenland's species are unique and can also be found in other countries like Canada.
Additionally, there is an anthropological distinction. The indigenous people of Australia, the Aborigines, belong to a race that is contained within the continent and its surrounding islands, similar to the indigenous people from other continents. This is in contrast to Greenland, where indigenous Greenlanders belong to a group of peoples (the Inuit) found throughout the Arctic, including parts of Canada, the United States, and Russia.
Finally, Australia is highly urbanised and has the 14th-largest economy in the world, with the second-highest human development index globally. It also has the ninth-largest immigrant population. These factors contribute to Australia's status as a continent rather than an island.
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Australia is too big to be an island
Australia is indeed a large country, but it is not an island. An island is typically defined as a piece of land that is completely surrounded by water and is smaller than a continent. Australia meets the first criterion but not the second. With a land area of 7,692,024 square kilometers, Australia is the planet's sixth-largest country and smallest continent. It is significantly larger than any other landmass classified as an island. For example, the island of Greenland, while not quite as large as Australia, is not considered a continent due to its less diverse plant and animal life and less varied geology.
The continent of Australia is sometimes referred to as an "island continent" because it is surrounded by ocean and has a unique flora and fauna, with many species found nowhere else on Earth. This isolation has led to the evolution of many distinct plant and animal species, contributing to Australia's reputation as an "island" of biodiversity. However, in geographical terms, Australia is firmly part of the continental landmass, not an island.
Another factor that distinguishes Australia from typical islands is its great diversity of landscapes and ecosystems. The continent boasts deserts, tropical rainforests, snow-capped mountains, and vast grasslands, a level of geographical variety not typically associated with islands, which tend to have more limited ecosystems due to their smaller size. Australia's size and geographical diversity are key factors that set it apart from islands.
Additionally, from a geological perspective, Australia is part of the Indo-Australian Plate, one of the major tectonic plates that make up the Earth's crust. Continents are defined in part by their association with these tectonic plates, and Australia's connection to this particular plate is a key factor in its classification as a continent. In contrast, islands are often formed by different geological processes, such as volcanic activity or the accumulation of coral reefs, which are not typically associated with the formation of continents.
Finally, the size and diversity of Australia's population further distinguish it from islands. With a population of over 25 million people, Australia is home to a wide range of cultural, ethnic, and linguistic groups, as well as a diverse array of industries and economic activities. This diversity and population size are more characteristic of continents, which tend to encompass multiple countries, cultures, and populations, rather than islands, which often have more homogeneous and limited populations due to their smaller size.
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Australia is an island continent
Australia is a continent surrounded by the Indian and Pacific Oceans. It is the smallest of the seven continents and the sixth-largest country in the world by area. Australia is sometimes referred to as an "island continent", a term that highlights its status as a continent that is entirely surrounded by water.
The term "island continent" is also used to emphasise Australia's distinctiveness as a landmass that rests on its own tectonic plate, the Australian Plate. This is one of the key criteria for defining a continent. Australia's unique flora and fauna, as well as its indigenous Aboriginal culture, further contribute to its status as a continent.
The question of whether Australia is an island or a continent has been a subject of debate. While geographers insist that Australia is not technically an island, the term "island continent" is commonly used to describe the country. This usage may stem from the fact that Australia was historically referred to as an island country due to its lack of land borders. However, with the advent of plate tectonics theory in the 1950s and 60s, the definition of a continent shifted to emphasise its geological and cultural distinctiveness.
Australia's size also plays a role in the debate. Some argue that Australia is too big to be considered an island, while others point out that there is no official maximum size for an island. Additionally, the perception of Australia as an island or a continent may depend on cultural perspectives and personal definitions.
In summary, Australia is an island continent, a term that captures its unique geographical characteristics as a continent surrounded by water and underpinned by its own tectonic plate. While the terminology surrounding Australia's status is contested, the country's distinctiveness as a landmass and its cultural significance are undeniable.
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Australia's unique flora and fauna
Australia is commonly referred to as an island or, more specifically, an "island continent". However, geographers insist that Australia is not technically an island but a continent or continental landmass. This is because Australia is too big to be an island, and it is also on its own tectonic plate, known as the Australian Plate.
Australia has a diverse range of unique flora and fauna. The country features the highest diversity of lizards in the world, with over 360 species. It is also home to 29 species of aquatic turtles and more than 200 species of amphibians, 93% of which are endemic. Australia has a high level of endemism, with 85% of its plant species being endemic. It is also home to half of the world's marsupial species, such as kangaroos, wombats, and possums. Other unique fauna in Australia include monotremes, such as the platypus and echidna, and dingoes, which are the largest terrestrial predator in Australia.
Australia is also home to a variety of snakes, with 140 species, including venomous species such as the inland taipan, the tiger snake, and the common death adder. The country also has saltwater and freshwater crocodiles, with males of the former reaching sizes of up to 6.3 meters. In terms of marine life, about 25% of the world's species of fish can be found in Australian waters, and the country is home to 1700 species of corals.
The federal Environment Protection and Biodiversity Conservation Act 1999 was created to meet Australia's obligations as a signatory to the 1992 Convention on Biological Diversity. This act protects all native fauna and provides for the identification and protection of threatened species. The Australian government has also created more than 500 national parks and passed several pieces of legislation to protect its unique fauna.
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Aboriginal Australians
Australia is considered a continent, not an island, as it rests on its own tectonic plate, the Australian Plate. It is, however, commonly referred to as an "island-continent".
The ancestors of present-day Aboriginal Australians migrated from Southeast Asia by sea during the Pleistocene epoch, making them among the first in the world to have completed sea voyages. They lived over large sections of the Australian continental shelf when sea levels were lower. At that time, Australia, Tasmania, and New Guinea were part of the same landmass, known as Sahul. As sea levels rose, the people on the Australian mainland and nearby islands became increasingly isolated, with some settling in Tasmania and on smaller offshore islands.
In the 2021 census, Aboriginal and Torres Strait Islander people comprised 3.8% of Australia's population. Most Aboriginal people today speak English and live in cities, but many also speak the traditional languages of their clans and peoples. Aboriginal Australians have faced severe health and economic disparities, and researchers have documented at least 270 massacres of Aboriginal Australians during the country's first 140 years.
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Frequently asked questions
Australia is considered a continent, not an island. However, it is sometimes referred to as an "island continent".
Australia is too big to be considered an island. It is also on its own tectonic plate.
An island is a mass of land that is "entirely surrounded by water" and "smaller than a continent".
Australia is about 3 million square miles (7.7 million square km) and is the smallest continent on Earth.
Some other examples of islands include Greenland, the largest island in the world, and Tasmania, an island that is part of Australia.
