Save the water, save the world!
water is a chemichal sustance that is composed of hydrogen and oxygen and is vital for al known forms of life.
normaly the water is liquid but it can be solid or gas (its the only thing that can be in the three states.water covers 71% of the earths surface.on earth it is found mostly in oceans and other large water bodies, with 1.6% of water below ground in aquifers and 0.001% in the air as vapor clouds. oceans have 97% of surface water, glaciers and polar ice caps 2.4% and water ponds and rivers 0.6%.
water on esrths moves continually through a cycle of evaporation, condensation and precipitation.clean, freshdrinking water is essential to human and other lifeforms.
jueves, 8 de abril de 2010
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