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Australia is a continent surrounded by oceans, and is sometimes referred to as an island continent. It is the smallest, lowest, flattest, and second-driest continent on Earth, after Antarctica. Australia is also one of the largest countries in the world, with a land area of 8.56 million square kilometres. The continent includes mainland Australia, Tasmania, the island of New Guinea, the Aru Islands, the Ashmore and Cartier Islands, most of the Coral Sea Islands, and some other nearby islands.
Is Australia a continental island?
| Characteristics | Values |
|---|---|
| Definition | Australia is considered a continental landmass as it sits on the Indo-Australian Plate and is the smallest continent in the world. However, it is also classified as a continental island as it is surrounded by ocean water and is separated from other landmasses by oceanic waters. |
| Size | Australia is the largest island in the world with a land area of 7,692,024 square kilometers. |
| Population | Approximately 25,731,531 million people as of 2022. |
| Geography | The continent/island is the lowest, flattest, and oldest continental landmass with a mean height above sea level of 330 meters. It is surrounded by the Indian and Pacific Oceans and has a unique diverse landscape ranging from tropical rainforests to deserts. |
| Geology | The landmass is incredibly stable and inert, with the oldest rocks dating back billions of years. The soil is generally infertile, and the continent is rich in mineral resources. |
| Biodiversity | Australia has an incredibly diverse range of flora and fauna, with many unique species found nowhere else on Earth. The continent is known for its iconic marsupials and unique bird species. |
| Political System | Australia is a federal parliamentary constitutional monarchy with six states and two territories. |
| Economy | With a GDP of $1.69 trillion in 2022, Australia has a mixed market economy, and its service sector contributes heavily to its economy, along with natural resources. |
| Culture | Australia has a diverse culture with influences from its indigenous heritage and its history as a British colony. It is known for its outdoor lifestyle, sports, and diverse cuisine. |
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What You'll Learn
Australia is the smallest continent
The continent of Australia is sometimes known in technical contexts as Sahul, Australinea, or Meganesia to distinguish it from the country of Australia. The name "Sahul" comes from the Sahul Shelf, which is a part of the continental shelf of the Australian continent. During the Pleistocene ice age, sea levels were lower, and the Australian continent was connected by dry land to the island of New Guinea, forming the combined landmass of Sahul.
Australia is also the lowest, flattest, and second-driest continent (after Antarctica). The highest point on the Australian mainland is Mount Kosciuszko in New South Wales, at 2228 metres above sea level. The lowest point is the dry bed of Lake Eyre in South Australia, which is 15 metres below sea level. Nearly 40 per cent of Australia's total coastline includes island coastlines, and about 20 per cent of its land mass is classified as desert.
Australia is sometimes informally referred to as an "island continent" because the country of Australia comprises most of the continent and is surrounded by oceans. Prior to the 1950s, before the popularisation of the theory of plate tectonics, Australia was sometimes described as an island continent in English-speaking countries. However, today it is recognised as one of the world's continents, with its own unique flora and fauna that have evolved in isolation over time.
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Australia is an island continent
Australia is a continent surrounded by oceans and is sometimes referred to as an island continent. It is the smallest of the seven continents and one of the largest countries on Earth. The continent includes mainland Australia, Tasmania, the island of New Guinea (Papua New Guinea and Western New Guinea), the Aru Islands, the Ashmore and Cartier Islands, most of the Coral Sea Islands, and some other nearby islands. Australia is nearly four times the size of Greenland, which is considered an island.
The continent of Australia is sometimes known as Sahul, Australinea, or Meganesia to differentiate it from the country of Australia. The name "Sahul" comes from the Sahul Shelf, which is a part of the Australian continent's continental shelf. The continent includes a continental shelf overlain by shallow seas that divide it into several landmasses, including the Arafura Sea and Torres Strait between mainland Australia and New Guinea, and Bass Strait between mainland Australia and Tasmania.
Australia is located in the Southern and Eastern Hemispheres, near Maritime Southeast Asia. It lies between the Pacific and Indian Oceans in the Southern Hemisphere. The Australian mainland extends from west to east for nearly 2,500 miles (4,000 km) and from the Cape York Peninsula in the northeast to Wilsons Promontory in the southeast for nearly 2,000 miles (3,200 km). The highest point on the Australian mainland is Mount Kosciuszko, New South Wales, at 2,228 meters above sea level, while the lowest point is the dry bed of Lake Eyre, South Australia, 15 meters below sea level.
Australia's unique geography and climate have led to the evolution of distinct plant and animal species found nowhere else in the world. The continent is relatively isolated, and its climate has been slowly drying, with high variability. This has resulted in a landscape that is largely arid to semi-arid, with an extensive arid core surrounded by areas of high rainfall intensity, such as the tropics and some coastal regions.
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Oceania: a continent or a division of the world?
The continent of Australia is sometimes referred to as an "island continent", surrounded by oceans and consisting of mainland Australia, Tasmania, and the island of New Guinea. Australia is the smallest continent and one of the largest countries on Earth. It is located in the Southern and Eastern Hemispheres, lying between the Pacific and Indian Oceans.
The term Oceania, originally a "great division" of the world in the 1810s, was used by geographers to refer to the region encompassing the Australian continent, Zealandia, and various islands in the Pacific Ocean. In the 19th century, many geographers divided Oceania into mostly racially-based subdivisions, including Australasia, Malaysia, Melanesia, Micronesia, and Polynesia. Today, the term Oceania is often used interchangeably with the continent of Australia, and it has been recognized by the United Nations as one of the world's five major continental divisions, along with Africa, Asia, Europe, and the Americas.
The distinction between a continent and an island can be based on several criteria, including geological, biological, and anthropological differences. While Australia is considered a continent, it shares similarities with islands. For example, Australia is geographically isolated, with unique plant and animal species that have evolved in its distinct climate. The Aboriginal people of Australia are also limited to the region, similar to how indigenous groups may be specific to certain islands.
In summary, the term Oceania can be understood as a division of the world that encompasses the continent of Australia and its surrounding islands. The interchangeable use of the terms Oceania and Australia highlights the complex nature of geographical categorizations and the evolution of our understanding of the world.
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Greenland: a continent or an island?
Greenland is an island situated between the Arctic Ocean and the North Atlantic Ocean. It is the world's largest island, with an area of over 2.16 million square kilometres (834,000 square miles). Despite its size, Greenland is not considered a continent. This is because there are several largely accepted factors that classify different regions of the world as continents, and Greenland does not meet these criteria.
One of the key factors is tectonic independence from other continents. Greenland shares a tectonic plate with North America, whereas Australia, the smallest continent, has its own tectonic plate. Another factor is unique flora and fauna. Greenland has fewer unique species than Australia, where a large percentage of plant and animal species are found nowhere else. Additionally, indigenous Greenlanders belong to a group of peoples (the Inuit) found throughout the Arctic, including parts of Canada, the United States, and Russia, whereas Aboriginal people are limited to Australia.
Population is another factor that can be considered when determining continental status. Australia has over 22 million inhabitants, whereas Greenland has just over 57 thousand. However, if population were the determining factor, Antarctica would not be considered a continent, either.
The distinction between Greenland and Australia is further highlighted by their differences in climate and geography. Greenland is largely uninhabitable due to its ice cap, while Australia's interior is largely uninhabitable due to its desert climate.
In summary, Greenland is an island rather than a continent because it does not meet the commonly accepted criteria for a continent. Australia, despite being much smaller in size, fulfils these criteria and is therefore classified as the smallest continent.
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Geological, biological, and anthropological distinctions
Australia is considered a continent and a country. It is the smallest of the world's continents, lying between the Pacific and Indian Oceans in the Southern Hemisphere. It is also the lowest, the flattest, and the driest continent apart from Antarctica. The continent includes mainland Australia, Tasmania, the island of New Guinea, the Aru Islands, the Ashmore and Cartier Islands, most of the Coral Sea Islands, and some other nearby islands.
Geological distinctions
The Australian continent is situated on its own tectonic plate, distinguishing it geologically from other landmasses. The continent includes a continental shelf overlain by shallow seas, which divide it into several landmasses, such as the Arafura Sea and Torres Strait between mainland Australia and New Guinea, and the Bass Strait between mainland Australia and Tasmania.
Biological distinctions
Australia's plant and animal species have evolved in isolation on a geographically isolated continent, with a slowly drying climate and high variability. A large percentage of Australia's plant and animal species are unique and cannot be found anywhere else in the world.
Anthropological distinctions
The Aboriginal people are indigenous to Australia, having arrived from Asia at least 60,000 years before European explorers. By 20,000 years ago, they had spread throughout the mainland and its chief island, Tasmania. Largely nomadic hunters and gatherers, they transformed the landscape, particularly through the use of fire, and established robust, semi-permanent settlements.
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Frequently asked questions
Australia is a continent. It is the smallest, lowest, flattest, and second-driest continent on Earth.
A continental island is an island that is part of the continent on a tectonic plate. An example of a continental island is Greenland, which shares a tectonic plate with North America.
A continent is a large continuous area of land that is not completely surrounded by water. An island is a piece of land surrounded by water on all sides.
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