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Roughly 71 percent of the Earth is covered in water, according to the U.S. Geological Survey. However, 96.5 percent of the water covering the Earth is saltwater and is unsuitable for human consumption. The remaining 3.5 ... More »

www.reference.com Science Earth Science

Water erosion occurs when moving water carries away bits of rock and dirt. There are four types of water erosion: sheet erosion, rill erosion, gully erosion and bank erosion. All of these depend on the type of land being... More »

www.reference.com Science Earth Science Erosion & Weathering

Hydropower is one of the oldest power sources, and it is a renewable source. Hydropower is less costly than most energy sources, and states in the United States that get the majority of their power from water have lower ... More »

www.reference.com Home & Garden Home Maintenance
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The land-to-water ratio on Earth is about 29 percent land to 71 percent water, according to the U.S. Geological Survey. Most of the Earth's water, about 96.5 percent, is saline water contained in the oceans. More »

www.reference.com Geography Bodies of Water

Seventy percent of the Earth's surface is covered by water, while the remaining 30 percent consists of the seven continental landmasses. The Earth is unique among the known planets in that is has an abundance of liquid w... More »

www.reference.com Science Earth Science

According to the U.S. Geological Survey, water makes up about 71 percent of the Earth's surface. About 96.5 percent of that water is in the oceans. Bodies of water, rivers, icecaps and water vapor hold much of the rest o... More »

www.reference.com Science Earth Science

According to the U.S. Geological Survey, about 71 percent of the Earth is covered in water. The total volume of all the water is equal to around 332.5 million cubic miles. More »

www.reference.com Science Earth Science