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? How much of the Earth is covered by sea? Some scientists say we should call our planet 'Water' instead of 'Earth', since water covers about 71 percent of the planet's surface. The area of the ocean surface is 1.40 x (10 to the power of 8) milesē. (3.62 x (10 to the power of 8) kmē). The area of the land surface is 5.75 x (10 to the power of 7) milesē (1.49 x (10 to the power of 8) kmē). There is over 2.4 times as much water area than land area. A world map shows at a glance just how much of the Earth's surface is covered by water.   Previous: Back Book: 1001 Section: Earth Chapter: Sea