how much of the earth is covered in water?
100786
Surface Area: Land area, about 148,300,000 sq km, or about 30% of total surface area; water area, about 361,800,000 sq km, or about 70% of total surface area.
915920
The percentage of the Earth's core that is solid is 4.7 %.  \n\nThe Earth's core is divided into the Inner core, which is solid, and extends for 1278 km, and the outer core, which is liquid, and extends for another 2210 km, or to a radius of 3488 km.  \n\nUsing the formula for Volume of a Sphere = (4/3) * Pi * Radius ^3 \nyou can calculate the volume of the Inner Core at 8.74 * 10^9.\nThe volume of ALL the core (Inner and Outer) is a total volume of 1.78*10^11.\n\nThe percentage of the Inner Core of the ALL the Core is \n8.74*10^9    /    1.74 * 10^11    =    4.7 %
221741
The density of seawater:\n\nhttp://hypertextbook.com/facts/2002/EdwardLaValley.shtml\n\nThe density of ice:\n\nhttp://www.elmhurst.edu/~chm/vchembook/122Adensityice.html\n\nThe figures for the world's volume of freshwater are available on a number of sites and in various texts.  Suffice to say that about 97% of the world's water is oceanwater, and some 80-90% of what's left over is frozen in the ice sheets.\n\n''With ice being significantly less dense than water will melted glaciers and ice mass really cause the ocean to rise? And even if that is so, would the volume of ice melting have to be incredibly dramatic to cause even a small rise?''\n\nDefinitely.  Sea ice will not contribute to rising sea level, but ice sequestered in glaciers will, because it was ultimately derived from the ocean.  The volume of melting would not have to be dramatic to make life interesting; if Greenland alone melted, that would raise sea level by some 20 feet.  A much smaller rise over the next century, of one to three feet, would still be disastrous for the most low-lying areas of the globe.
347844
70% of the Earth's surface is covered with water, but that's considerably different than the Earth being 70% water.\n\nThe deepest part of the ocean is the bottom of the Marianas trench, at about 11 km deep.  There is another 6366 km of rock underneath the trench before you reach the center of the Earth.\n\nThat's less than 0.1 % of the depth of the Earth, rather less than the peel on an apple, even if the whole ocean was as deep as the Marianas trench.\n\nHow much of the Earth is sand is trickier to answer, depending on how you define sand.  At what point do sand grains get small enough to be called silt, or large enough to be called gravel?  And do you include sandstone?  In any case, it's going to be a fairly small proportion compared to the overall size of the Earth.  Sand is only going to found on the surface.  Deeper down it will be quickly melted down and reformed.
834678
The water cycle is usually broken into 4 basic steps:\n1) evaporation / transpiration / sublimation\n2) atmospheric storage\n3) condensation / precipitation\n4) runoff/infiltration / surface storage\n\nThere is as much water on the planet today as there was when dinosaurs roamed the Earth. There will always be plenty of water.\n\nNow, if we are talking about useful water, we need to reexamine this. You may first want to look at NASA's global water map:\nhttp://www-surf.larc.nasa.gov/surf/pages/water.html\n\nNASA also has a page for global water distribution:\nhttp://earthobservatory.nasa.gov/Library/Water/\nThis page illustrates the tiny portion of useful water on our planet.\n\nThere are two larger issues that NASA does not discuss in their global water distribution. 1) Keeping in mind that the US has just about the same amount of water available as it did 200 years ago, there are now 250 million to share with instead of the 4 million of 200 years ago. 2) Of the roughly 3/4% of fresh water in groundwater and lakes and streams around the world, much of that is too polluted to drink.\n\nWith regard to the coming urgency for "Thinking Globally - Acting Locally", check out Jonathan Harris' "infographics" poster:\nhttp://www.princeton.edu/~ina/infographics/water.html When our neighboring countries run out, they will be forced to do what you do when you run out of sugar in the middle of a recipe - run over to the neighbor's for some.\n\nWhen we waste water, we are not only using our drinkable water but we are also moving water to the undrinkable part of the water distribution. True, we aren't losing any water on this planet, but we are losing useful water and won't be getting any more new water, either.\n\nIf we do, it will be in the form of a large icy comet and we probably won't need water at all after that.
258479
Water is H2O. Two hydrogen and one oxygen. Water is the universal solvent because it mixes well with most substances. Water is the most common and mysterious substances on earth. Water is suppose to be a gas ,but it's a liquid at room temperature. Water has a negative side (oxygen) and a positive side (hydrogen). This is another reason why water is the universal solvent it can dissolve just about any solute because the H and O are at 102o angel which means it can pick up most solutes. 97% of the earth's water is salt water will only less than 3% is drinkable. 70% of the earth's animals live in salt water. All animals need water.
260885
water represent 2/3 from earth surface
844016
size.\n\n\nOceans (from Ὠκεανός Okeanos in Greek, the ancient Greeks noticing the strong current that flowed off Gibraltar and assuming it was a great river) cover almost three quarters (71%) of the surface of the Earth, and nearly half of the world's marine waters are over 3,000 meters (9,800 ft) deep. The area of the oceans is 361 million sq. km.\n\nThis global, interconnected body of salt water, called the World Ocean, is generally divided by the continents and archipelagos into the following bodies, from the largest to the smallest: the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Southern Ocean, and the Arctic Ocean.\n\nSmaller regions of the oceans are called seas, gulfs, straits and other names.\n\nA sea is a large expanse of saline water connected with an ocean, or a large, usually saline, lake that lacks a natural outlet such as the Caspian Sea and the Dead Sea. The term is used colloquially as synonymous with ocean, as in the tropical sea or down to the sea shore, or even sea water referring to water of the ocean. Large lakes are sometimes referred to as inland seas, such as the Great Lakes. Many seas are marginal seas, in which currents are caused by ocean winds; others are mediterranean seas, in which currents are caused by differences in salinity and temperature.\n\nhttp://www.iho.shom.fr/PUBLICATIONS/download.htm
1061323
I'm surely not an expert in this, but I'll tell you what I know.\nThe salinity of ocean water varies from place to place. The oceans that surround the polar regions are less salty than the Persian Gulf areas. Also where rivers and streams empty into the ocean, that area tends to be less salty than the open ocean.\nSalinity is reported in terms of parts per thousand ( 0/00 ).\nSalt content in ocean water ranges from .5 0/00 to 40 0/00.\nThe average ocean salinity is 35 0/00. \nI had an ocean map which showed salt content of the world oceans, but cannot find it. I know this would have been a great help answering your question.  What I do remember of it is, that most major oceans had a salt content that ranged between 32 0/00 and 35 0/00.\n32 0/00 being close to islands and continents and 35 0/00 was recorded surrounding the center of the major oceans.\nI'm sure I did not answer your question completely, but I hope I helped?
16446
Since 70% to 75% of the Earth's surface is water, I would think it would make less of an impact than if they were just left on land.  There are so many billions of ocean creatures that would flourish off the food supply that would be provided by such a terrible catastrophe.
61329
321,000,000 cubic miles of water in the oceans! That is 96.5% of the water on the Earth...\n\nKeep in mind that a cubic mile is a little bit over a TRILLION gallons! Mind boggling, isn't it?
265467
It is likely that the amount of water has increased over time. Water on the planet is considered to be from three sources, chemically separated from rocks, from meteorites, and as part of comets.\n\nHowever, contrary to the beliefs of many who have answered this question there are numerous earth processes that both create and eliminate water. There are sedimentary rocks on the planet that were deposited in water over 4 billion years ago, so it has existed on the earth for a long time. \n\nWe currently consume 83 million barrels of oil every day on the planet, and that oil and natural gas creates large volumes of water vapor from the hydrogen contained in it. In fact, it probably releases a larger volume of water than the volume of the oil since it combines with atmospheric oxygen. Burning coal also releases water.  In the overall volume of water on the planet, this is all probably insignificant. \n\nMany other processes both create and destroy water. Concrete for example chemically incorporates water into its structure when it solidifies. Many rock processes involve incorporation of water into the chemical structure of the rock, and others release water. Minerals such as gypsum are formed by chemical incorporation of water with anhydrite. The water becomes part of the rock. \n\nBiological processes also chemically consume water. Plants incorporate water into their carbohydrate molecules produced during photosynthesis. \n\nOf course, over geologic time most of these processes are cyclical so it is difficult to say if there is a trend in any direction. Most of them are fairly minor in relation to the total volume of water on the planet. \n\nhttp://ga.water.usgs.gov/edu/earthhowmuch.html
933439
I dont know, but seeing as no-one else answered, can I have the 10 points please ?\nBut if the question is directed at Earth then the Earth is covered with 70% water and approx 85% of that is salt water!
391671
Well, try to estimate ...\n\nCertainly, much-much-much-much less than even 2 to 549th power ... of course you cannot count, but you can make a very rough estimate.\n\nThe radius of Earth is roughly 6000-7000 km, so its surface area is ~ 10^8 km^2 = 10^16 cm^2\n\nNow go out in your back yard and count the average number of grass blades/cm^2 ... let's say you get 1/cm^2\n\nAs not all of the Earth is covered with grass, its unlikely that there are much more blades than 10^16. So 12900459358983340354 is definitely WRONG. But it's also unlikely that there are less than 10^13. Now I know that 10^16 is 1000 times greater than 10^13, but even with such rough estimates, we do know more than before doing these calculations, don't we?
382819
There are an estimated 325 to 330 million cubic miles of water on Earth, and of that about 3,100 cubic miles exists as water vapor in the atmosphere.\n\nSo the answer to your question is "Nay nay", but it was a good question.
950722
water in form of seas ,river,oceans,pond etc
309151
Most of Earth's water condensed out of its early atmosphere, and that atmosphere came from world-wide volcanic eruptions. So, ultimately Earth's water resulted from volcanic activity, although much of it also comes from comets that entered our atmosphere.\n\nGod should be spelled B-I-G B-A-N-G\nPBrax@netscape.com