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Name: Sandra Cole
Status: Student
Age: 14
Location: N/A
Country: N/A
Date: N/A 


Question:
Why is salt water different color then fresh water?



Replies:
Sandra,

Water itself is colorless. If you do see color, you either see the result of organisms living in the water (algae, bacteria, plankton, or even plant species) or reflection of the sky in the water.

You will note in fresh water, the organisms present will generally be different than those which are able to survive in salt water. In your average lake, for example, you might find plant species which would be killed by the presence of salt in the water. Lake water therefor might appear to be more on the green side, while sea water, being generally less an ideal environment for run of the mill plant species ( you do find seaweeds and other plants which have made adaptations to survive in deep salt water) might appear more colorless and then reflect colors seen in the typical sky , i.e. appear more on the blue side.

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