GEOLOGY

Detailed explanation-1: -island, any area of land smaller than a continent and entirely surrounded by water. Islands may occur in oceans, seas, lakes, or rivers. A group of islands is called an archipelago.

Detailed explanation-2: -Oceanic islands-these islands rise to the surface from the floor of the oceans. Example: The Mariana Islands, the Aleutian Islands. Continental islands-these islands are the unsubmerged parts of the continents that are completely surrounded by water on all sides. Example: Greenland, Madagascar.

Detailed explanation-3: -An island is a landmass (smaller than a continent) that is surrounded by water. Many island countries are spread over an archipelago, as is the case with Indonesia and the Philippines-these countries consist of thousands of islands.

Detailed explanation-4: -An island is a body of land surrounded by water. Continents are also surrounded by water, but because they are so big, they are not considered islands. Australia, the smallest continent, is more than three times the size of Greenland, the largest island.