• Question: why is there salt in the sea?

    Asked by ls to Claire, Liad, Ruth, Ryan, Mako on 18 Jun 2015.
    • Photo: Ruth Elderfield

      Ruth Elderfield answered on 18 Jun 2015:

      When the rain lands, it have to travel through the land to get to the sea. As the water moves through the land it picks up minerals that dissolve out of the rocks and soil, these are the salts. When all the rivers get to the sea, they take the salts with them, when the water evaporates to made more rain, the salts get left behind. That is why the sea is saltier than the river.

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