Drift-ice, also known as sea ice, is formed when the ocean water freezes and breaks apart into large sheets or chunks that float on the water's surface. There are several synonyms for drift-ice, such as ice floe, pack ice, ice pack, and ice field. These terms are often used interchangeably to describe the same phenomenon, but there are subtle differences between them. Ice floe refers to a single sheet of ice while pack ice refers to a series of ice floes that are connected. Ice pack and ice field refer to large areas covered by pack ice. Regardless of the exact terminology used, drift-ice is a beautiful and awe-inspiring natural phenomenon that can be found in many parts of the world.