If salt kills snails, then how do they live in the ocean?
473784
Good question!\nIt has to do with osmosis. When salt is placed on a land snail, water will move out of the snail in an attempt to balance the concentration of salt inside and outside of the body. It is the same thing as when you take a swim, and water diffuses out of your fingertips and causes them to shrivel. Just as that happens, the snail will shrivel up. However, marine snails have a different concentration of salt inside their bodies. But remember- salts in the ocean are only around 775 parts per MILLION- that's not very concentrated! So therefore, marine snails can have higher salt concentration inside their bodies to keep water from diffusing out of them and prevent them from shriveling up. If you were to place regular table salt on a marine snail (and please, please, please, don't do this_), they would probably shrivel up just like land snails do.\nHope this helped!
53298
Salt is an herbicide, or in other words, salt is very harmful tp lants and will kill them.
90693
At the moment, they are in balance.  The salt in the ocean came from minerals and rocks dissolved over millions of years. To markedly increase salinity in the world's ocean, a substantial quantity of water would have to be lost. In general, our planet biosphere has a set quantity of water. It is either tied up in oceans, living creatures, clouds/vapor, ice or the freshwater sources in wells, rivers, etc. What evaporates from the sea is ultimately returned via rivers, runoff, etc. The melting icecaps is actually a SUBSTANTIAL contributer to the total volume of the seas. However, as sea levels rise, so does rthe capacity to absorb more minerals, so the salinity would fluctuate over a few thousand years and stabilize about where it is now.
93113
Where they live:  "There are about 1,800 living species of sea star, and they occur in all of the Earth's oceans. The greatest variety of sea stars are found in the northern Pacific Ocean."\n\nWhat they eat:  "Some species take advantage of the great endurance of their water vascular systems to force open the shells of bivalve molluscs such as clams and mussels, and inject their stomachs into the shells. Once the stomach is inserted inside the shell it digests the mollusk in place."\n  \nGood luck! :)
478512
The salt causes chemical reactions to occur and the iodine chephapod in the snail dissolves and the snail dies
317174
Dear Friend,\n\nSalt in the ocean comes from the land. The elements that make up salts, such as chlorine and sodium, started out in rocks. Water and acids eroded the rocks, and rivers carried the elements into the sea. The oceans usually contain 35 parts of salts for every 1000 parts of sea water. This is lower in some places where there is a lot of fresh water coming into the ocean. It is higher where the Sun is very strong and evaporates more of the water. When all the water is gone, the salts are left behind as solid, white crystals.\n\nThe right amount of salt is a very important part of our diet. In ancient times, salt was worth its weight in gold. People used it to flavor and preserve their food. Without salt, the food would spoil. For this reason, salt became a symbol of purity. Some sacrifices in the Old Testament included salt (Leviticus 2:13; Ezekiel 43:24). Jesus called faithful people "the salt of the earth," and the apostle Paul said that our speech should be "seasoned with salt" (Colossians 4:6).
519909
It's a combination of less sunlight & density currents.\n\nCold salty water is very dense. It sinks. This along w/ surface flow created by winds creates currents in the sea.\n\nCold water ends up on the bottom.\n\nThe amount of geothermal energy located on the ocean floor is negligible here. It only makes a difference on a local scale. The ocean floor is very deep and very large. Too much space for geothermal vents to heat.
1108406
Every answer so far has been wrong. I really wish people wouldn't just guess at the answers to get points.\n\nThere is a species of saltwater amphibian , but just barely. The crab eating frog of south east Asia  commonly lives in mangrove estuaries. It can survive and even breed in brackish water without diffciulties. \n\nIt can and does occasionally venture into water with salt levels equivalent to  the open ocean, but prolonged exposure dehydrates it and must retreat to fresher water to rehydrate every few hours.\n\nCrocodiles and turtles aren't amphibians. They are freakin' reptiles. They've got scales for pity's sake.
98279
Molluscs include over 160,000 species, with about 128,000 of those species still iiving. The answerers who have never heard of a mollusc may be surprised to learn that almost any sea shell they have ever encountered is a mollusc, and that they likely eat molluscs from time to time as clams, oysters, mussels, abalone, scallops, escargot, and conch are all molluscs. Octopus and squid are also (very tasty) molluscs from the Class Cephalopoda.\n\nA typical example of a gastropod (P. Mollusca) is a cone shaped spiral shell of a snail. They live both in salt water, fresh water and on land, within all latitudes and down to about 3000 meters ocean depth.\n\nA Bivalve example would be a clam. Most are bottom dwellers, some bore into rock and wood, and they live in both fresh and salt water. Most inhabit shallow waters.\n\nAn example of a Cephalopod would be a Nautiloid. These attractive shell creatures swim in the ocean (in a fashion) typically in deep waters nearby shallower areas, and they typically feed in the shallow at night and retreat to depths during the day. Octopi and squid are other examples which show intelligence and have eyesight.
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.
1011630
I know of two ways.\n1. It is mined from deposites underground.  They used to do this near where I grew up as the chlorine in the salt was used in the processes at the nearby chemical plants.\n\n2.  It is evaporated from ocean water.  Once the water is evaporated mostly what's left is just regular salt.  It just has to be cleaned up a bit.
670488
Salt in the ocean comes from the land. The elements that make up salts, such as chlorine and sodium, started out in rocks. Water and acids eroded the rocks, and rivers carried the elements into the sea. The oceans usually contain 35 parts of salts for every 1000 parts of sea water. This is lower in some places where there is a lot of fresh water coming into the ocean. It is higher where the Sun is very strong and evaporates more of the water. When all the water is gone, the salts are left behind as solid, white crystals.\n\nThe right amount of salt is a very important part of our diet. In ancient times, salt was worth its weight in gold. People used it to flavor and preserve their food. Without salt, the food would spoil. For this reason, salt became a symbol of purity. Some sacrifices in the Old Testament included salt (Leviticus 2:13; Ezekiel 43:24). Jesus called faithful people "the salt of the earth," and the apostle Paul said that our speech should be "seasoned with salt"
193147
The hard, rigid outer covering of certain animals is called a shell. While many animals, particularly those that live in the sea, produce exoskeletons, usually only those of mollusks are considered to be shells. It is sometimes erroneously claimed that shells are made of chitin, but these are unrelated materials (except for their hardness and use as a covering by animals).\n\nThe shell is usually made of nacre, an organic mixture of outer layers of horny conchiolin (a scleroprotein), followed by an intermediate layer of calcite oraragonite, and then a layer of calcium carbonate (CaCO3) in the form of platy crystals.\n\nNacre is secreted by the epithelial cells (formed by the germ layer ectoderm) of the mantle tissue of certain species of mollusk. Mollusk blood is rich in a liquid form of calcium. In these mollusks the calcium is concentrated out from the blood where it can crystallize as calcium carbonate. The individual crystals of each layer differ in shape and orientation. Nacre is continually deposited onto the inner surface of the animal's shell (the iridescent nacreous layer also known as mother of pearl), both as a means to smoothen the shell itself and as a defense against parasitic organisms and damaging detritus.\n\n \nVarious seashellsWhen a mollusk is invaded by a parasite or is irritated by a foreign object that the animal cannot eject, a process known as encystation entombs the offending entity in successive, concentric layers of nacre. This process eventually forms what we call pearls and continues for as long as the mollusk lives.\n\nShells are very durable and outlast the otherwise soft-bodied animals that produce them by a very long time. Large amounts of shells may form sediment and become compressed into limestone. Shells that wash up on beaches are called seashells, and are collected by some enthusiasts
702149
salt water is heavier than fresh water. If the water is salty enough, the egg will float. Otherwise, it will sink.
589999
It is actually easier for fish to live in salt water than fresh water because the ionic balance of the water is closer to that of their own blood. Fresh water fish constantly have to pump out the excess water they accumulate due to osmosis. Marine mammals (seals, whales etc) maintain their ionic balance in water by having protective compounds in their skin which acts as a waterproof barrier.
636644
they have a natural process of osmosis that stabalises them with the water and salt content of the sea when they drink the water so that they get enough water in their bodies while being able to live in the salty sea.
669930
Take live snails to the mall, blindfold passersby, and feed them snails.  Hypothesis, snails taste gross. Prove or disprove. Discuss.  Alternate hypothesis, life gives life.  If snails ate humans, then humans would kill snails.  Since they don't eat humans, there is no good rational for killing them.  Unless you have too much salt and are bored :)