4 Positive effects of diffusion Negative effects of diffusion
5 What is diffusion?Positive effects of diffusion.Negative effects of diffusion.Bibliography
6 What is diffusion?It is a spontaneous intermingling of two different, bordering gases, liquids or solids, occurring due to the movements of molecules. Diffusion occurs at all temperatures.
7 Positive effects of diffusion We can smell beautifulscents of flowers,plants and perfume.Insects, attracted by thescent, find food and at theSame time pollinate plants.
8 Plants produce oxygen which is spread aroundThere is the possibilityof creating chemicalsolutions and mixturesin natureDiffusion has enabled creationof matter in the universe
9 Negative effects of diffusion Viruses and bacteriawhich cause infectiousdiseases are spread aroundHarmful gases andliquids are transferred,which adversely affectsthe Earth’s atmosphereOzone holes and acid rainappear
10 Surface water and groundwater become easily contaminatedowing to oil-tanker catastrophes,municipal and liquid industrial wastesSoil contamination by all kindsof dust and industrial waste,chemical fertilizers and pesticides
11 BIBLIOGRAPHY:Encyklopedia powszechna PWN (Popular encyclopaedia PWN)the Internet :The presentation prepared by Natalia Stochła, student of I e group
21 Prepared by the Polish group Prepared by the Polish group. Translated also by the Polish group with some help of their English teacher Renata Drążek.Based on:Gawron Elżbieta: An illustrated book of physics problems, Educational Publisher FOSZE in Rzeszów (Ilustrowany zbiór zadań z fizyki, Wydawnictwo Oświatowe FOSZE w Rzeszowie)Wojciech Trzyna – Pictures (Rysunki)