water water water
what happen with the water?
disappear disappear the water disappear
why why this is bad to our live
to the animals and plants
OK if you want to help
don´t contaminate
that really good for all the world
and you want to the world survive
many years more to your sons
miércoles, 14 de abril de 2010
jueves, 8 de abril de 2010
¿what is water????????
Water (H2O) is the most abundant molecule on Earth's surface, constituting about 70% of the planet's surface. In nature it exists in liquid, solid, and gaseous states. It is in dynamic equilibrium between the liquid and gas states at standard temperature and pressure. At room temperature, it is a nearly colorless with a hint of blue, tasteless, and odorless liquid. Many substances dissolve in water and it is commonly referred to as the universal solvent. Because of this, water in nature and in use is rarely pure and some of its properties may vary slightly from those of the pure substance. However, there are many compounds that are essentially, if not completely, insoluble in water. Water is the only common substance found naturally in all three common states of matter—for other substances, see chemical properties. Water is essential for life on Earth. Water usually makes up 55% to 78% of the human body.
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