What is the diffrence between salt water and fresh water?
546808
Saltwater tastes nasty... kinda ermmmm... saltyish. It's also lethal to some aquatic life whilst essential to others.\n\nAlso drinking salwater will dehydrate you whist fresh water hydrates you.
844403
The reason why sea water is salty is of course because of the presence of salt. However, how does it get into the ocean?? \n\nAs water evaporates, it rises and cools and becomes clouds. It then falls off as rain. These are fresh water as the process is like distillation. As you may know, water is a pretty good solvent and as it washes down the ground, it dissolves small amount of minerals, which includes salt, NaCl.\n\nAs you know, water does not just stay on the ground, it flows from high place to low, carry all these minerals with it. As it moves to the lowest point on earth, there is no where to go, so it accumulates. As time goes on, it forms ocean. As this process continues, all the salts are washes into the ocean with no exit, as a result, make the ocean more and more salty.\n\nThe dead sea, is indeed the lowest level on earth, and is indeed the most salty sea. The water density is so high (because it has so much salt in it) that almost anything can float on it.
810676
Salinity is measures as the amount of salt content in water in ppt (parts per thousand).\nThe amount of salinity depends on the source of water that feeds water into the sea. At the sea bed there is sand, rocks and sediments which contribute to the salt content in the sea. If there are many fresh water rivers opening into the sea with continuous supply the salinity will be low. Also if there is continuous supply of melting snow (this happens near the poles), content of salt will be low. \nHowever, if there is not much of fresh water flowing into the sea, the salinity will be high. Also, if the rate of evaporation is high, salinity will be high (this happens in tropical regions) because water evaporates leaving behind salts.\n\nThe Dead Sea has the highest salinity in the world. In fact the density of water is so high due to salt content that humans can actually float on the water. This is because Dead Sea is completely land-locked and has no source to supply fresh water.
844146
If you are looking for a term, its called osmosis.  Thats where something of a greater concentration, shares that material, with something of a lower concentration.  Thus the joke about learning by osmosis by laying your head down on a book, hoping to absorb the knowledge from the book. \n\nThere is actually a 'line' that fluctuates between freshwater sources and saltwater sources.  Its called the salt-line, or brine-line, or brackish line.  There are probably other names.  The area between the two can be rather large, and called brackish water.  Not quite salt water (brine), and not quite freshwater.  Some aquatic creatures actually need this condition to mate and go through other life phases.  \n\nThese 'lines' can change depending on tidal conditions, inland precipitation, storm surges, temperature, and other sources.  They are by no means permanent.
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
269477
the study of the areas between fresh water and salt water and the ecosystems in between.
875269
The density is different - sea water being more dense than fresh.\n\nFreezing point (lower for sea water) and boiling point (higher for sea water) would be slightly different.\n\nElectrical conductivity would be different (higher for sea water).\n\nAll these things are different - but the differences are also all due to the salinity difference that you mentioned.
235582
The salt comes from the deposition a long period of time from  rivers and streams. Earth has salt naturally with in soils and such. Think of it this way, salt Was being deposited at a faster rate than it was being removed over millions of years giving salt water. The oceans are NOT getting saltier, it is in a state of equalibrium currently with the rate of removal over deposition.
415923
Yes, salt water is a sodium chloride solution with Na+ and Cl- ions. when two seperate condutors are immersed in the solution without contacting each other and a bulb or any electrical appliance is placed across the conductors the positive and negative ions migrate and conducts electricity.
496521
The concentration of salt in seawater varies with temperature.  Because the Arctic and Antarctic oceans are colder than the Indian Ocean and South China Sea, the salt is less soluble.  By the same principle, seawater near the floor of the ocean would be less salty because it's cold down there.  Throw in a few baby volcanoes, the Atlantic rift and a few dozen fumaroles, etc...  Then, you would have to know how many liters of water are in the oceans and that quantity is constantly changing.  Now, are you talking about common NaCL?  Or do you want to include all the sulfates, carbonates, phosphates, etc... which are all in the ocean?  Thanks for the easy 2 points!
977415
Salt water does not have any specific effect on weather formation. But all sources of water whether it is river, lake, pond, sea or ocean; by evaporation affect humidity and therefore the weather conditions.
289316
They are often different due to the different water temperatures.  The total amount of dissolved salt in water decreases with temperature.
80201
Yes. The salt water is denser and thus easier to float on. I have tried this in the Great Salt Lake and experienced it first hand.
58936
All water, even rain water, contains dissolved chemicals which scientists call "salts." But not all water tastes salty. Water is fresh or salty according to individual judgment, and in making this decision man is more convinced by his sense of taste than by a laboratory test. It is one's taste buds that accept one water and reject another.\nA simple experiment illustrates this. Fill three glasses with water from the kitchen faucet. Drink from one and it tastes fresh even though some dissolved salts are naturally present. Add a pinch of table salt to the second, and the water may taste fresh or slightly salty depending on a personal taste threshold and on the amount of salt held in a "pinch." But add a teaspoon of salt to the third and your taste buds vehemently protest that this water is too salty to drink; this glass of water has about the same salt content as a glass of sea water.\nObviously, the ocean, in contrast to the water we use daily, contains unacceptable amounts of dissolved chemicals; it is too salty for human consumption. \n\nHOW SALTY IS THE OCEAN?...\nHow salty the ocean is, however, defies ordinary comprehension. Some scientists estimate that the oceans contain as much as 50 quadrillion tons (50 million billion tons) of dissolved solids.\n\nIf the salt in the sea could be removed and spread evenly over the Earth's land surface it would form a layer more than 500 feet thick, about the height of a 40-story office building. The saltiness of the ocean is more understandable when compared with the salt content of a fresh-water lake. For example, when 1 cubic foot of sea water evaporates it yields about 2.2 pounds of salt, but 1 cubic foot of fresh water from Lake Michigan contains only one one-hundredth (0.01) of a pound of salt, or about one sixth of an ounce. Thus, sea water is 220 times saltier than the fresh lake water. What arouses the scientist's curiosity is not so much why the ocean is salty, but why it isn't fresh like the rivers and streams that empty into it. Further, what is the origin of the sea and of its "salts"? And how does one explain ocean water's remarkably uniform chemical composition? To these and related questions, scientists seek answers with full awareness that little about the oceans is understood.\n\n\nIllustration: Sources of salts in the ocean.\n\nTHE ORIGIN OF THE SEA...\nIn popular language, "ocean" and "sea" are used interchangeably. Today's seas are the North and South Pacific, North and South Atlantic, Indian and Arctic Oceans and the Antarctic waters or seas.\nScientists believe that the seas are as much as 500 million years old because animals that lived then occur as fossils in rocks which once were under ancient seas. There are several theories about the origin of the seas, but no single theory explains all aspects of this puzzle. Many earth scientists agree with the hypothesis that both the atmosphere and the oceans have accumulated gradually through geologic time from some process of "degassing" of the Earth's interior. According to this theory, the ocean had its origin from the prolonged escape of water vapor and other gases from the molten igneous rocks of the Earth to the clouds surrounding the cooling Earth. After the Earth's surface had cooled to a temperature below the boiling point of water, rain began to fall and continued to fall for centuries. As the water drained into the great hollows in the Earth's surface, the primeval ocean came into existence. The forces of gravity prevented the water from leaving the planet.\n\nSOURCES OF THE SALTS...\nSea water has been defined as a weak solution of almost everything. Ocean water is indeed a complex solution of mineral salts and of decayed biologic matter that results from the teeming life in the seas. Most of the ocean's salts were derived from gradual processes such the breaking up of the cooled igneous rocks of the Earth&#39
590266
fresh water is hypotinc, so it gets drawn into the pulmonary circulation, leading to haemodilution, hyponatraemia and even haemolysis. while hypertonic salt water, drains water out of the pulmonary circulation, to the alveoli, leading to pulmonary oedema.
182633
A: Saltwater has a much lower freezing point (the freezing point is the temperature where something freezes) than freshwater does. And the more salt there is in it, the lower the freezing point gets. So in order to know the exact temperature that it's going to freeze, you have to know just how salty it is. For saltwater that's as saturated as it can possibly get (i.e. there's no way to dissolve any more salt in it no matter how hard you tried), the freezing point is  -21.1 degrees Celsius or -69.98 degrees Fahrenheight. This is when the saltwater is 23.3% salt (by weight).
633933
uh?\nsaltwater fish need salt water to survive. they die in fresh water.\nfresh water fish die in salt water, because they bodies are not designed for living in salty water.