An island is an area of land that is completely surrounded by water. Islands come in all shapes and forms. They can vary in size from a single rock, to a huge land mass.
Greenland is the world’s largest island. Australia is also surrounded by water, but it is considered to be a continent, rather than an island. It is difficult to determine the world’s smallest island, but some, like Singapore, are really tiny.
Islands can be found in the middle of the ocean, or just off the coast. They are also found in rivers, deltas, and lakes.
Islands are formed in different ways, and they are classified according to how they came into existence. Many islands have flora and fauna that are unique to them, and found nowhere else in the world.