18. Pollution of Air and Water Class 8 Science [LATEST] Solutions Chapter Review in English - CBSE Study
NCERT Solutions for Class 8 Science are carefully prepared according to the latest CBSE syllabus and NCERT textbooks to help students understand every concept clearly. These solutions cover all important 18. Pollution of Air and Water with detailed explanations and step-by-step answers for better exam preparation. Each Chapter Review is explained in simple language so that students can easily grasp the fundamentals and improve their academic performance. The study material is designed to support daily homework, revision practice, and final exam preparation for Class 8 students. With accurate answers, concept clarity, and structured content, these NCERT solutions help learners build confidence and score higher marks in their examinations. Whether you are revising a specific topic or preparing an entire chapter, this resource provides reliable and syllabus-based guidance for complete success in Science.
Class 8 English Medium Science All Chapters:
18. Pollution of Air and Water
1. Chapter Review
Chapter Review:
- The contamination of air by impurities like smoke and poisonous gases which may have a harmful impact on the living and the non-living components, this is called air pollution.
- The substances which contaminate the air and water. These are called pollutants.
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Components of air is Nitrogen 78%, Oxygen 21%, carbon dioxide, argon, and methane.
- Ozone layer prevents us to the ultraviolet rays coming from the sun.
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Ultraviolet rays carry radiations Which harm our body and cause various diseases like cancer and skin disorders.
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The sulpher dioxide and nitrogen dioxide form sulphuric acid and nitric acid react with moisture and water vapour in atmosphere. These form rain acidic . This is called acid rain.
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There is raising the quantity of CO2 in atmosphere resulting in increasing continue average temperature of atmosphere. This is called global warming.
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If the sunlight enters into nursery (glass house) which is not allowed to come out. The trapped heat warms the green plants. Similarly our atmosphere trapped radiation and warms the earth. This effect is known as green house effect.
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The full form of CFCs is Chlorofluorocarbons.
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The full form of WWF is Word wide Fund.
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The green house gases are CO2 , Methane and nitrous oxide etc.
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An ambitious plan to save the river, called the Ganga Action Plan was
launched in 1985. -
Water which is suitable for drinking is called potable water.
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The 4R principle is Reduce, reuse, recycle and recover.
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