Why is
Australia
a continent and
Greenland
is not? The definition of a continent varies so the number of continents varies between five and
seven continents
. Generally a continent is one of the major land masses on earth. However, in every accepted definition of continents, Australia is always included as a continent (or is part of an "Oceania" continent) and Greenland is never included.
While that definition might not hold water for some people, there is no official globally recognized definition of a continent. Just as some seas are called seas and others are called gulfs or bays, continents generally refer to the major land masses of earth.
Even though Australia is the
smallest of the accepted continents
, Australia is still more than 3.5 times larger than Greenland. There has to be a line in the sand between small continent and the
world's largest island
and traditionally that line exists between Australia and Greenland.
Besides size and tradition, one can make the argument geologically. Geologically, Australia lies on its own
major tectonic plate
while Greenland is part of the North American plate.
Locally, residents of Greenland consider themselves islanders while many in Australia see their county as a continent. Even though the world lacks official definitions a continent, it should be concluded that Australia is a continent and Greenland is an island.
On a related note, I will here state my objection to including Australia as part of a "continent" of Oceania. Continents are land masses, not regions. It is completely appropriate to
divide the planet into regions
(and, in fact, this is quite preferable to dividing the world into continents), regions make better sense than continents and they can be standardized.