Here is your answer.
http://en.wikipedia.org/wiki/Archipelago
Archipelago is a group or chain of islands.
It is known as an archipelago.
Luzon and Mindanao form part of the Philippines, along with many more islands.
Sometimes. Many volcanoes form islands, but not all do.
The Aleutians Islands form part of Alaska.
Hurricanes form over the open ocean not on islands.
The plural form of island is "islands."
Island arc volcanoes are islands that form in chains underwater and emerge above the surface for form a series of islands.
They can and do. Many small rocky islands in the pacific are volcanic in origin.
A chain of 14 large volcanic islands and 55 smaller ones form the Aleutian Islands.
Barrier islands form as the result of wave or tidal flow parallel to a coastline.
One volcano can form one island normally. If it collapses into a caldera it could form a group of three or four.