Water is a precious resource to all forms of life. It is hard for us to imagine the Earth without it. Sometimes it seems like we have an unlimited supply and it can be easy to take it for granted. On of the important goals of this unit is to understand how much water is available, where and in what form. The first thing we look at is reservoirs. A reservoir is a place where water is naturally stored.
Reservoir of Water Percentage of Earth's Total Water
Oceans 97%
Polar Icecaps & Glaciers 2.5%
Groundwater 0.4%
Lakes and Rivers 0.07%
Atmosphere 0.03%
Biosphere 0.001%