1. ISTITUTO COMPRENSIVO “P. S. ZIMARINO” - CASALBORDINO SCUOLA MEDIA “L. DA VINCI” - SCERNI WATER: SOURCE OF LIFE Water resembles the soul of man Descends from the sky, back to heaven Then again, it is force that falls upon the earth , (Vincenzo Errante) In another series of eternal story ...

2. Water is a precious element which covers about the 3/4 of the earth’s surface. Without water there wouldn’t be any form of life on the earth. WHAT IS WATER?

3. WATER ORIGIN The water on the earth probably originated after the very numerous and intense volcanic eruptions which took place on the earth’s surface for about 3 milliard years.

4. Water is a compound of hydrogen and oxigen and it has chemical formula H 2 O WATER COMPOSITION

5. WATER’S CLASSIFICATION There are several kinds of waters on the earth: Superficial Drinkable Mineral Thermal

6. WATER CYCLE It consists of a continous movement of water from atmosphere to soil and from ground to atmosphere.

7. They are natural flous of water which gush out from the ground in a single point and are fed by a vein flowing in non visible underground ways. THE SPRINGS

8. They are watercourses with perennial flow fed by springs, atmospheric precipitations and by the waters from meltin of snow and glaciers. THE RIVERS

9. THE GLACIER IS USUALLY COMPARED TO A RIVER FLOWING BY GRAVITY FORCE FROM THE HIGHEST MOUNTAIN DOWNWARDS AD PROVIDING WATER TO VALLEYS AND FEEDING RIVERS. THE GLACIERS

10. WATER CONSUMPTION Beginning from the 60s the water consumption remarkably increased, so much to become a real problem for the future generations.

11. With the extraordinary increase of the industrial production and of the consuptions, it was determinated a deep alteration of the surround environment. Among the most evident injuries caused by man to habitat, there is the water pollution . WATER POLLUTION

13. PETROLEUM PARASITICIDES PESTICIDES FERTILIZERS WASTE NATURAL WATER POLLUTION DEATH OF FISH AND SEA-BIRDS LOSSES IN TOURISM AND ECONOMY HEALTH DAMAGES WATER BEDS POLLUTION EUTROPHICATION OF LAKES AND SEAS INDUSTRIAL AND HOUSEHOLD WASTE

14. During floods, river waters carry several materials, among which there is also organic material that undergoes processes of putrefaction and fermentation. NATURAL WATER POLLUTION

17. INDUSTRIAL WATER POLLUTION Most of the factories produce organic waste which give rise to fungi and bacteria. One million tons of waste are discharged into our seas. 70% come from industrial waste.