Why Is the Ocean Salty?

💡 Simple Explanation

Rain slowly wears down rocks on land, carrying tiny bits of salt and minerals into rivers. Rivers flow to the ocean, bringing all that salt along. When ocean water evaporates to become rain again, the salt gets left behind - it can't float up into clouds. Over billions of years, more and more salt has collected in the ocean. It's like making soup and letting the water boil away - what's left keeps getting saltier and saltier!