What is water called when it has a high concentration of iron, magnesium, or calcium?
hard
a lake
groundwater
soft

I think Hard

Explanation:

Hard water, water that contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Ferrous iron may also be present; oxidized to the ferric form, it appears as a reddish brown stain on washed fabrics and enameled surfaces.

and after water is usually warmed by the sun the water temperature raises and then evaporates .

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