Question

why the sea water is salty ​

Answer 1

Answer:

salt in the ocean comes from rock from land.The rain that falls on the land contains some dissolve carbon dioxide from the surrounding air. This causes the rainwater slightly to be acidic due to carbonic acid ( and this form carbon dioxide and water)..

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Answer 2

To understand why the seas are so salty, look no further than the water cycle. Simply put, the water cycle begins when fresh water falls from the sky in the form of rain. It eventually ends up in rivers, lakes and oceans, where it soon evaporates to form clouds and repeat the cycle.

If you dig a little deeper into each stage of the water cycle, you'll see just how salt gets into the mix. That fresh water that falls as rain isn't 100 percent pure. It mixes with carbon dioxide in the atmosphere on the way down, giving it a slightly acidic quality. Once it reaches the Earth's surface, it travels over land to reach area waterways. As it passes over the land, the acidic nature of the water breaks down rocks, capturing ions within these rocks and carrying them to the sea. Roughly 90 percent of these ions are sodium or chloride — which, as we know, form salt when they band together