Iceberg is a large piece of ice that has broken off from a glacier or ice sheet and floats in water. Most of the iceberg stays below the surface, with only a small part visible above. Icebergs can vary in size, from small pieces to very large masses. They drift slowly with ocean currents.

Icebergs are found in oceans and seas near polar regions, especially the Arctic and Antarctic. They form when glaciers or ice sheets lose chunks of ice into the sea. Icebergs can be seen by ships and wildlife. They are part of cold ocean environments.