Água fonte de vida

Abstract

The water source of life is fundamental for the Human being survival, because without it there wouldn't be any species of life on the planet. The water is everywhere, on the clouds, in the ocean, in the rivers, in the lakes, in the groundwater, in the air, in the plants, in the animals, in our body. With no doubts the most important, and fundamental for the life, the human being survival. The water can be found in the nature in three physical states, solid or gaseous. Being the liquid state the most common, its composition, the knowledge is essential, start from de composition of the substances that we best understand its proprieties or characteristics which are common to all the liquid and gases fluids. Through the water proprieties it allows to characterize the kinds of water that exist in our planet, the sweet water, the salt water,the drinkable water, the mineral water, the destilled water, the thermal water and the polluted water and how the water treatment in an ETA works. This paper had as objective show the 5ª grade students how the physical states of water changes work. The result of the analysis will be through experiences realized in the classroom.