If you come to a term that is underlined that you don't know, you can click on it to find a definition. Other sources of water include clouds, springs flowing from groudwater, lakes and rivers, and icebergs . As a matter of fact, icebergs are our largest supply of fresh water.
Earth obtains small amounts of new water each time a volcano erupts and releases water vapor .
In general, the water we use today is the same water used millions of years ago. Water moves from place to place in a large, complex system called the water cycle . Water evaporates from the ocean and other water sources. As the water vapor rises, it cools and condenses . The water gathers into clouds, growing larger and heavier, until they fall from the sky in the form of precipitation .