Background Information Water is one of the basic building blocks of all life. It is also one of the basic ingredients of our weather. It is present in oceans, rivers, lakes, the polar ice caps, clouds, rain or snow, ground water and living things such as plants and animals. Water is always moving. Surface water, warmed by the sun, evaporates into the atmosphere.
Water vapor is carried by the wind all over the globe.
Eventually the water vapor cools and condenses into clouds, fog, dew or various forms of precipitation. Once on the ground the water can evaporate directly or travel as runoff into the ocean, rivers, lakes or a ground water system eventually to evaporate again. This dynamic pathway of water is called the water cycle . Procedure Put about a cup of water into the baggie. Add a drop or two of food coloring.