Does Dew Fall?
Is cold necessary for dew? Is there dew in the desert? On the other hand, where does the water in an open jar go as it seems to disappear? Do animals come out at night and drink it? Does temperature make a difference as to the rate of disappearance? Does water seem to disappear from a sealed jar? Cloud Observations Students may begin to discover mechanics that create the water cycle. Water can change to a gas and become a part of the air, and water can change from a gas in the air into water, and presto–clouds and rain form. A cloud in a bottle can then be created by putting some warm drops of liquid water in a glass soda bottle and, after standing awhile, dropping a smoking match in the bottle. After the smoke clears, suck on the bottle and a cloud should form since reducing the pressure reduces the temperature and condensation occurs on the smoke particles. Weather and “Ocean Water Moving” Do a cloud exploration. How often do you see clouds? What do the clouds look like? Can you cre
Ever since ancient times, people have been saying that dew “falls,” but it’s not true. Dew forms where you find it — on plant leaves, not in the clouds. This is how it happens: At night, the air gradually cools off. Cool air holds less water than warm air, so that when the temperature of the air drops to a certain point, water i
” Dew and frost are not forms of precipitation because they do not fall from clouds. Rather, they develop in place on exposed surfaces. Though we usually only think about frost this time of year, dew is actually far more common. Each time you come in from the cold and your eyeglasses fog up, dew has formed, but not fallen! Copyright © 2000 Kathy A. Miles and Charles F.
