Question

Why is sea water salty? How?

Answer 1

Answer:

Salt in the sea, or ocean salinity, is mainly caused by rain washing mineral ions from the land into water. Carbon dioxide in the air dissolves into rainwater, making it slightly acidic. ... Sodium and chloride, the main constituents of the type of salt used in cooking, make up over 90% of all the ions found in seawater.

Answer 2

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The salt in the ocean mostly got there as the result of a process called weathering, which transfers mineral salts from rocks on land into the sea. Rain is not pure water, but contains small amounts of carbon dioxide absorbed from the air; this makes rainwater very slightly acidic. When this weak acid falls on land, tiny traces of minerals dissolve from rocks into the water

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