why the sea water are salty ?

Answer 1

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.
A 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.
Obviously, the ocean, in contrast to the water we use daily, contains unacceptable amounts of dissolved chemicals; it is too salty for human consumption.

HOW SALTY IS THE OCEAN?...
How 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.

If 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.

Everyone who has been to the beach knows that seawater is salty. Everyone also knows that fresh water in rain, rivers, and even ice is not salty. Why are some of Earth’s waters salty and others not? There are two clues that give us the answer. First, “fresh” water is not entirely free of dissolved salt. Even rainwater has traces of substances dissolved in it that were picked up during passage through the atmosphere. Much of this material that “washes out” of the atmosphere today is pollution, but there are also natural substances present.

THE SALTS IN THE SEA CAME FROM:

***weathering of continents
***hydrothermal vents
***submarine volcanoes

Answer 2

Cause of the presence of minerals that arise in the sea water from the underground soil and marine aquatic life .

Answer 3

it is beacause minerals from the ground (minerals are very salty) are washed into the surface of the sea as a result they become salty

Answer 4

Because of high levels of sodium chloride from the following reasons:
**The rivers carry dissolved salts at low levels to the sea and ocean which is then deposited and got concentrated over years.This could be from rocks along the way or from salt akes.
**The eruption of volcanoes under water brings out high level of minerals.
**Seawater reaction with hot rock and dissolving some of the mineral constituents including sodium and chlorine.♥

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Answer 5

When there is a new rock and then it rains, all the soluble salts are washed and end up at the end in the ocean.

Answer 6

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Answer 7

I always wondered that, but never pursued it, but what baffled me is why in movies they could never drink the water & what a horrible death they had from doing it, what is that all about.

Answer 8

Too much salt.

Answer 9

Because people pee in the ocean.

Answer 10

'cos the fresh water's not!