4Positive effects of diffusion Negative effects of diffusion
5What is diffusion?Positive effects of diffusion.Negative effects of diffusion.Bibliography
6What 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.
7Positive effects of diffusion We can smell beautifulscents of flowers,plants and perfume.Insects, attracted by thescent, find food and at theSame time pollinate plants.
8Plants produce oxygen which is spread aroundThere is the possibilityof creating chemicalsolutions and mixturesin natureDiffusion has enabled creationof matter in the universe
9Negative 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
10Surface 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
11BIBLIOGRAPHY:Encyklopedia powszechna PWN (Popular encyclopaedia PWN)the Internet :The presentation prepared by Natalia Stochła, student of I e group
21Prepared 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)