It often happens that people want to dry up something or somewhere, or they want to prevent drying for some other reasons. If sugar, salt or other chemicals are able to affect the evaporation of water, we can use them to decrease or increase the evaporation of water as we need to. In this experiment we will only test salt and sugar, because they are easily available at home. However many other chemicals are available for industrial use and can be tested for their affect on the evaporation of water.