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Grade 8 Chemistry - Unit 4: Environmental Chemistry
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Air | አየር
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Air pollution | የአየር ብክለት
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Global warming | ግሎባል ዎርሚንግ
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Hardness of water | የውሃ ጥንካሬ
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Softening of hard water | ጠንካራ ውሃ ማለስለስ
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Water pollution | የውሃ ብክለት
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Water purification | ውሃን ማጣራት
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Soil and its composition | አፈር እና ይዘቱ
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Acidity and alkalinity of soil | አሲዲቲ እና አልካሊኒቲ
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Plant nutrients | የእጽዋት ንጥረ ምግቦች
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Methods of improving soil fertility | የአፈር ለምነትን ማሻሻያ መንገዶች
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Fuel | ነዳጅ
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Composition of coal, natural gas and crude oil | የ ኮል፣የተፈትሮ ጋዝ እና ድፍድፍ ነዳጅ ይዘት
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Use of coal, natural gas and crude oil | የ ኮል፣የተፈትሮ ጋዝ እና ድፍድፍ ነዳጅ ጥቅም
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