ساينس الصف السادس الإبتدئي الفصل الدراسي الاول ساينس سادسة ابتدائي – ترم أول In This part we will study : Carbon Dioxide Carbon Dioxide: a gaseous chemical compound in its natural state. – Carbon dioxide gas represents 0.03 % from the air volume. – Carbon Dioxide molecule composed of One carbon atom & Two oxygen atoms. – It is very important for photosynthesis of green plants. – Benefits of Carbon dioxide: Carbon Dioxide gas is important in photosynthesis process (G.R) because plant use it to build their bodies and make food of all living organisms. – Harms of Carbon dioxide: The removal of forests leads to the increase of carbon-dioxide gas percentage in the air which causes harms to the earth’s climate and raises its temperature. – Carbon dioxide sources: 1. Carbon dioxide results from combustion of organic material such as (Wood–Coal–Oil–Gasoline) 2. Respiration of all living organisms during exhalation process. – Factors that increases the percentage of carbon dioxide in air: 1. Removal of forests. 2. Combustion of fuel in factories and means of transportation. (G.R):The environment suffers from an increases of carbon dioxide Due to removal of forests and combustion of fuel in factories and means of transportation. لمتابعة مستر احمد الباشا وكل ما يخص الساينس : جروب الفيس بوك http://bit.ly/2Of1mcN صفحة الفيس بوك http://bit.ly/2Gq5xMo بالتوفيق مستر احمد الباشا