A solar still works on two scientific principles: evaporation and condensation. The salts and minerals do not evaporate with the water. ... Most stills are simple black bottomed vessels filled with water and topped with clear glass or plastic. Sunlight that is absorbed by the black material speeds the rate of evaporation.
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Answer:
evaporation and condensation.
Explanation:
A solar still works on two scientific principles: evaporation and condensation. The salts and minerals do not evaporate with the water. ... Most stills are simple black bottomed vessels filled with water and topped with clear glass or plastic. Sunlight that is absorbed by the black material speeds the rate of evaporation.