1001 Space Earth Earth Rocks and Minerals Landscape Sea Weather and Climate Natural Disasters Resources Nature History Human World Science and Technology

Choose a Page:How long has there been life in th...How much of the Earth is covered b...Why does seawater taste salty?Is the ocean floor flat?What causes waves?*What is an iceberg?*Are tidal waves caused by the tides?What are ocean currents?How has the ocean bed been measured?How does the sea affect the climate?How do coral reefs form?Are there currents at great depths?Why does the tide come in and go out? What is an iceberg? Vast sheets of ice cover the coldest parts of the Earth. When these ice sheets meet the sea, parts break off and float away, forming icebergs. In the Arctic, lumpy and angular icebergs form when the ice in a glacier meets the sea. In the Southern Hemisphere, icebergs break off the ice cap that covers Antarctica. These broad, flat icebergs can be as large as a country. Ice is less dense than seawater, so huge masses of ice can float in the ocean.   Previous: Back Book: 1001 Section: Earth Chapter: Sea