Does the sum total of water on or in our planet remain constant?
489363
Yes, it remains constant, but is not constantly in the same form...ice melts, water evaporates, vapor condenses, etc.  But I think that overall the sum is the same...
369884
Global warming is believed to be an average raise in temperature.  Not all areas will experience it (if it even exists).  But the Earth goes through weather cycles (as in the cold cycle when there were glaciers covering the Earth, we are now just entering into the warm phase).  This is my theory.  But, as I said, it will not be total, constant raise in temperature.  Some spots will notice the difference, others won't.  It's an overall average.
226812
Wouldn't that depend on the amount of salt in the water? Or are you talking specifically about fully saturated water?\n\nThe viscosity of water is 0.890 × 10^-3 Pa*s.\nThe viscosity of our ocean is 1.002 x 10^-3 Pa*s.
1089748
no, but it would be very stupid to assume that Earth is the only planet that can sustain and contains life.  the universe is gigantic.  i don't think any human can truly grasp how vast the universe is.
313516
you can check the hydrology subject, precipetation infiltrate the earth, run off on the surface and evaporate, count the usage of water of every individual multiply by population plus waste you can get the answer
449917
Water Systems:\n\nhttp://www.ec.gc.ca/water/images/nature/prop/a2f2e.jpg\n\n95% of Earth's water is Salt Water leaving 5% as Fresh Water.  Nearly all of the Fresh water is in the form of Ice or underground.\n\nThis site appears to have a lot of data as well as activities for learning.\n\nhttp://members.aol.com/bowermanb/water.html
789602
It's also true with water going down the drain. It goes the other way in the southern hemisphere, because of the earths rotation.
759811
See my answer to this question in "General-Science and Mathematics."  :)
814756
or_try_this is correct.  It is dense, and a 30-inch column of mercury fits in a laboratory better than a 34-foot column of water.  It is stable and doesn't evaporate at room temperature.  Its thermal expansion can be compensated for, but it's usually small compared to the pressure differences it's measuring.  It looks scientific, too.
348954
As long as the planet earth provides water and air.
503457
Yes. It cycles from one form to another; i.e. rain, rivers, oceans, glaciers, ect.Even the moister in our bodies. There is never more or less.
223771
This is not true, but widely circulated as fact.\n\nI quote verbatim from snopes:\n\n"Because  \n\n   the Earth is a globe spinning on an invisible axis, a point at its equator will make a circuit of 25,000 miles in the space of a day, but any point not on the equator will make a shorter round trip; the closer that point is to either of the poles, the shorter its trip will be. Put another way, a pencil     at the equator travels 1,030 miles an hour, whereas another at Sarasota, Florida, moves at 930 miles per hour, and one at the North pole doesn't move at all. \n\n This apparent difference in speed results in the Coriolis force, an effect that imparts a twist to largish events happening away from the equator. Best known is its effect on air masses: as they move away from the equator, their speed (which matches that of where they started from) appears to be faster than that of the surface over which they are traveling. This sets them turning in a clockwise twist in the northern hemisphere and a counterclockwise twist in the southern. (Before you complain we have that backwards, please click here.)  Likewise, a cannonball fired due north will veer a teeny bit to the east, and one fired to the south will deflect ever so slightly to the west, something a skilled gunner would make an adjustment for. \n\n The twisting effect of the Coriolis force is real and does influence certain large things like the movement of air masses, but the effect is so small that it plays no role in determining the direction in which water rotates as it exits from a draining sink or toilet. The Coriolis effect produces a measurable effect over huge distances and long periods of time, neither of which applies to your bathroom. Toilets and sinks drain in the directions they do because of the way water is directed into them or pulled from them. If water enters in a swirling motion (as it does when a toilet is flushed, for example), the water will exit in that same swirling pattern; as well, most basins have irregular surfaces and are not perfectly level, factors which influence the direction in which water spirals down their drains. The configuration of taps and drains is responsible for the direction of spin given to water draining from sinks and bathtubs to a degree that overwhelms the slight influence of the Coriolis force. \n\n The belief that the Coriolis force influences the direction in which water drains from plumbing fixtures is widespread and has been repeated as fact in a number of venues, including popular television shows (such as world traveler Michael Palin's Pole to Pole) and even in textbooks.  We can only speculate on why people are so enamored of this snippet of misinformation, guessing that it has something to do with the desire to find some of the mysteries of science in the realm of the everyday. "
318431
Atmosphere has a very low heat capacity compared to hydrosphere. It will react strongly on short term (well below diurnal) changes, like insolation (amount of energy absorbed by the sun).
493390
Hi,\n\nThis is a fairly complex topic. The basic idea is that because H2O(18) is heavier than H2O(16), it has a higher heat of vaporization.  So, H2O(16) evaporates faster, and as evaporation occurs, the H2O(18)/H2O(16) ratio will decrease for the atmosphere and increase in the water.\n\nThe warmer the water is, the smaller the difference in evaporation rates. So, the ratio of H2O(18)/H2O(16) in atmospheric water vapor is a good indicator of ocean temperature. This becomes relevant for climate change research because that ratio is 'captured' when atmospheric water vapor falls as Arctic (or Antarctic) snow.  By taking an ice core and examining the H2O(18)/H2O(16) ratio of different samples, we can estimate the global temperature at the time that ice froze. This is one of the so-called paleothermometers used to reconstruct the earth's climate history.
801479
You would not have changing seasons, I suppose the temperatures in various locations on earth would remain constant
840814
the water cycle is what it says it is,the cycle water goes through.there has always been the same amount of water in the earth at all times.basically it is recycled.water from bodies of water is evaporated and rises into the atmosphere.it isnt all H2O.it contains all of the impurities and other elements also.the partcles form clouds and when they get heavy enuogh it rains.but it isnt just rain from the beginning.as it falls ,it starts out as frozen water(snow)and as it falls toward the earth,it melts into raindrops.i hope this helps.
1087611
More than 70% .        Of the whole earth's surface 80% is water. \nIt's too bad, 97.2% of all the water on earth is salt water though. \nNow, where do you think most salt water is found? That only leaves 2.8% is fresh water that we can drink or play in.