An ICEBERG is a large, floating mass of ice that is found in the ocean. It is formed when chunks of ice break off from glaciers or ice shelves and float freely in the water. Icebergs are usually white or blue in color due to the air bubbles trapped in the ice. They can range in size from small chunks to massive structures that are hundreds of feet tall. Icebergs can be dangerous for ships as they are often difficult to spot and can cause serious damage if they are struck.