Apart from this there are some more gases present such as ozone, argon, methane etc. Each year, human beings generate millions of tons of wastes in form of garbage, refuse, or trash. This is SMOG which is made up of smoke and fog. While brushing your teeth, leaving the tap running may waste several litres of water. These industries cause chemical contamination of water. So, how can we make our water safe for drinking purpose? And this phenomenon is called “Marble cancer”. It is done by adding chlorine tablets or bleaching powder to the water. These are good notes, but pls add more of gases like sox and nox, cfc's, etc. A tap that drips once every second wastes a few thousand litres of water every year. Its main component is methane. if (i < 10) { A11- An increase in the level of nutrients in water body leads to an increase in the growth of algae in the water. Carbon dioxide, argon, methane, ozone and water vapor are also present in very small quantities. ((w.adpushup = w.adpushup || {}).control = (w.adpushup.control || [])).push(k); Take a plastic bottle and cut it into 2 halves at the centre. Example includes washing of clothes, industrial waste from factories, etc. Kanpur has more than 5000 industries. We should realise our responsibility and start using environment-friendly processes for survival of our planet is in danger. Indeed, this water seeps into ground and has polluted ground water too. There is reverse osmosis system present in such filters which make water pure. Automobiles which burn diesel and petrol also produce tiny particles which remain suspended in air for long periods. The addition of undesirable and unwanted material in water which makes water harmful for biotic and abiotic components is called water pollution. It reduces the oxygen-carrying capacity of the blood. Trees take up carbon dioxide and release oxygen. Its harmful effects are as follows: Q8- Describe the ‘Green House Effect’ in your own words? So, now we will study what acid rain is? Air pollution is created by cars, which release carbon dioxide. It contains oxides of nitrogen and causes problems in breathing, cough, etc. Large quantities of garbage, untreated sewage, dead bodies, and many other harmful things are discharged into the river. Reuse: We can reuse the things in our daily routine work so that it will reduce the amount of wastage. A serious problem which is faced by this holy river is that it has become a much polluted river. Try using public transport more. 4.With this information, the class should hypothesize the effects air pollution has on plants, as well as animals. To control pollution level in the Ganga, A programme was initiated known as the Ganga Action Plan. Get Revision notes of Class 8 th Science Chapter 18 Pollution of air and water to score good marks in your Exams. Copyright © 2021 - 2021 should be used. (iii) Reduce the use of non biodegradable materials like things made of plastic, disposals, polythene etc. This combination of various gases present in our atmosphere is known as air. Smog: It is comprises of smoke and fog. CFCs damage the ozone layer of the atmosphere. The exhaust which is released from the vehicle contains nitrogen dioxide and sulphur dioxide. 3. These wastages are thrown out the water bodies, rivers and make the water contaminated. It is the wastage that we produce in our homes and communities. By volume, about 78% of this mixture has nitrogen gas and about 21% is oxygen. Key points to Prevent Air Pollution: By volume, about 78% of this mixture is nitrogen and about 21% is oxygen. var month = ("0" + (now.getMonth() + 1)).slice(-2); } It may have some kind of impurities present in it in the form of micro organism. Large quantities of garbage, untreated sewage, dead bodies, and many other harmful things are discharged into the river. results from water pollution. Use the upper half as a funnel by putting it upside down in the lower half. The lesson covers the complete explanation of class 8 … A tap that drips once every second wastes a few thousand litres of water every year. River Ganga is one of the ten most endangered rivers in the world. So, it is affecting human life also. Industries are supposed to treat the waste produced before discharging it into waters, but quite often the rules are not followed. Pollutants are also added to the atmosphere by certain human activities. World Wide Fund for Nature (WWF)’s study found that Ganga is one of the ten most endangered rivers in the world. The Ph level of this water is 7. It has also helped me in my exams to revise chapter easily and I was able to score god marks in my exams. As these gases are lighter they rise up in the sky. This website is very helpful to me. River Ganga is one of the ten most endangered rivers in the world. 3. Examples are oil refineries, paper factories, textile and sugar mills and chemical factories. The rays that come from the Sun consist of visible light, infra red rays and ultra violet rays. Q. Therefore, the overall temperature of earth’s surface rises. Begin the activities by displaying and reviewing the lesson vocabulary (pollution, surroundings, litter, and environment). People can be seen bathing, washing clothes and defecating in the river. The amount of emissions from household chimneys and vehicles should be controlled. The major pollutants which cause water pollution are : Sewage, Fertilisers, Pesticides and Industrial wastes. should be used. document.write(''); So, now we know that there are various types of pollutants present in the environment and they are very harmful for us. 4. 3. In this lesson, students learn words and phrases to talk about pollution. Therefore it is suggested to first purify it by using filters or by boiling it and then use it. Lesson Activities: (45 min. (iv) Use empty jars into containers for leftover food. Teaching Kids About Pollution, Air, Land, & Water Pollution Activities, Pollution Printables for Kids and Earth Day Activities, Over 120+ Earth Day Ideas, Awesome Ways to Teach Kids About Pollution, and Pollution Activities for Kids, Pollution Projects for Kids, Earth Day Theme for Preschool and Kindergarten, Ways to help protect the Earth Q10- Describe the threat to the beauty of the Taj Mahal? class) 5 min: Introduce the lesson; causes of pollution . 4. Pollutant Posters (Grades 6-8) Just like acid rain one more issue of concern is global warming. When rain water mixes with pollutants present in air. Also, there are visibility problems in affected areas. Chlorination: Chlorination is a commonly used chemical method for purifying water. Required fields are marked *, About | Privacy Policy | Disclaimer | Sitemap. Pollution of Air and Water, CBSE Science Class 8 Chapter Wise Solved Q&A. 2. //var today = now.getFullYear()+"-"+(month)+"-"+(day); The soil is also affected by impure water, causing changes in acidity, growth of worms, etc. (function (w, d) { for (var i = 0, j = d.getElementsByTagName("ins"), k = j[i]; i < j.length; k = j[++i]){ This also affects the purity of water making it unfit for drinking purpose. Taj Mahal as we all know is made up of marble. If such water is used by us, it can cause various infections. Each year, human beings generate millions of tons of wastes in form of garbage, refuse, or trash. Example includes washing of clothes, industrial waste from factories, etc. Effect of Global Warming: There are no microorganism present in this water. (ii) Purchasing durable, long-lasting goods. Let’s study the case of Taj Mahal. Not only this there are many other monuments which are a heritage property for India are getting spoilt because of air pollution. So, the main aim was to reduce the pollution level of Ganga to make it a clean river. Pollution: Pollution is the introduction of harmful or poisonous substances into environment that may cause adverse effects. It is a poisonous gas. All rights Reserved. And these are very helpful in studies. Ans. When acid rain occurs, it disturbs the ph balance of water bodies resulting into damage to the aquatic life. why humans do not see that environment is polluted, this topic is very good and helpfull in study. A3- No, we cannot support the above statement because it is not always necessary that the clear, transparent water is fit for drinking. As we know, it leads to heating effect. Many industries discharge harmful chemicals into rivers and streams causing the pollution of water. We should not use more chlorine tablets than specified. Pollution Management Indoor Air Pollution (Grades 4-6) Stinky Air Pollution and the Great London Smog (Grades 4-6) Noise Pollution Near Home (Grades 4-6) Preserving the Shining Sea from Ocean Pollution (Grades 4-6) Water Pollution in the Hudson River: Captain Maher's Story (Grades 7-8) ; describe how pollution increases water’s scarcity and limits its uses for consumers. s = checkTime(s); 1. And the ozone layer is responsible for protecting us from harmful ultraviolet rays of the sun. Key points to Prevent Water Pollution: Now we will discuss  the different types of pollution: 1. document.write(''); It reduces the oxygen-carrying capacity of the blood this means that it is very harmful for the human beings. Pollution of Air and Water Class 8 Science NCERT Intext Activities Solved Activity 1 (NCERT Textbook, Page 239) You may have covered your nose while passing a brick kiln emitting smoke or started coughing while walking on a busy road (Fig. From water and air pollution worksheets to water land air pollutants videos, quickly find teacher-reviewed educational resources. Have students identify what is wrong in each of the pictures displayed. This has caused the Taj Mahal becoming pale. The acids drop down with rain water, making the rain acidic. Proper sewage treatment plan must be implemented. All this is leading towards the pollution in the river Ganga. the issues of Pollution. 5 min: Review vocabulary terms dealing with the lesson. Acid rain can be harmful for living beings and also for non-living things. Kanpur is one of the most populated towns in U.P. ... Get Lesson plans, Lesson notes, Scheme of work, Exam Questions, Test Questions for all subject for Primary school and Secondary School. They reduce visibility. Now, the Government of India has launched a new initiative known as National Mission for Clean Ganga (NMCG) in 2016. You must have heard about acid rain? 1. It is suffering with the monument cancer and the main reason behind this corrosion is air pollution. The substances that pollute water are called water pollutants. The idea of reduce, reuse and recycle should be incorporated for prevention of water pollution. This helps our planet in keeping itself warm and thus helps in human survival. It result forms nitric acid and sulphuric acid resulting into acid rain. Cleaner fuels like CNG (Compressed Natural Gas). Industries are supposed to treat the waste produced before discharging it into waters, but quite often the rules are not followed. 6. Many industries discharge harmful chemicals into rivers and streams, causing the pollution of water such as eutrophication which we have already discussed. 3. Q6- Explain circumstances leading to acid rain. Many industries discharge harmful chemicals into rivers and streams causing the pollution of water. 3. You have to deliver the speech in your class? 7. Maintaining the source of water to keep it clean and pollution free. So, in this chapter we will study that how air and water pollution is going to damage our earth and our environment. It is the trapping of radiations inside the earth’s atmosphere. 2. The chemicals released include arsenic, lead and fluorides which lead to toxicity in plants and animals. This monument is also corroding day by day. Till now we have read that Ganga has become a polluted river and as we know that the increasing population is also one of the reason behind the polluting of the river. 1. Natural resources like solar energy, tidal energy, etc. 3. Activities include vocabulary exercises on types, causes, effects and ways to prevent pollution. Students investigate the pollutants on the wooden block. This in turn causes fishes and aquatic organisms to die. So, planting more number of trees will reduce the amount of carbon dioxide responsible for Greenhouse Effect. How is Water Purified ? A1- Following are the different ways which contaminates water: Sewage waste: The sewage waste such as laundry waste or the toilet waste causes pollution in water. Air and water pollution is one of the most common topics that are repeatedly asked in Class 8 … Sometimes, such substances may come from natural sources like smoke and dust arising from forest fires or volcanic eruptions. if(k.className == "adPushupAds" && k.getAttribute("data-push") != "1") { Along with other gases, CO, Because of human activities the amount of CO. 1. So, now the rain water no longer remains a pure water it turns into acidic water. At household level, candle type filter can be used. The information in this lesson is reinforced with visuals, including photographs of places with bad air pollution, and students are asked to redraw scenes without the air pollution in order to get them to think more about its effects on the environment. As a result, they get trapped inside the green house and growth of plants is stimulated because optimum temperature is achieved inside the green house. Take a plastic bottle and cut it into 2 halves at the centre. In this air pollution lesson plan, 4th graders test the air quality by using a block of wood and petroleum jelly. Whenever harmful substances such as sewage, toxic chemicals, silt, etc., get mixed with water, the water becomes polluted. As we know that the increasing population and industrialization have already damaged this mighty river beyond repair. These notes are short and easiy to write and learn. Sulphur dioxide resulting from burning of fuels such as coals might result in respiratory problems. These particles are also called SPM (Suspended Particulate Matter). The roof allows infra red rays to enter but after reflection, they are not allowed to go back. Pollution of Air and Water Class 8 Science Chapter 18 as per NCERT Book used in CBSE and other Schools. Water Pollution: Get Pollution of Air and Water, Science Chapter Notes, Questions & Answers, Video Lessons, Practice Test and more for CBSE Class 10 at TopperLearning. But what are they? So we should not create wastage by reducing the uses of goods. However, an indiscriminate increase for gases can lead to excessive increase in the Earth’s temperature leading to global warming. i = "0" + i; emit chlorofluorocarbons (CFCs). Find out how acid rain is a threat to monuments. The water, which is fit for drinking because it is clean and transparent. Filtration: You have already seen how water is filtered. The contamination of water of rivers, lakes and ponds, etc., with unwanted and harmful substances is called water pollution.. Some plans can be implemented for polluted rivers like Ganga Action Plan was launched in 1985 with the aim of reducing pollution levels in river. If such fecal contaminated water is consumed then it can cause many infections. Trees take up carbon dioxide and release oxygen. Oxygen carrying capacity of blood reduces because of improper burning of vehicle fuels; As the vehicles emit high levels of pollutants like carbon monoxide, carbon dioxide, nitrogen oxides and smoke into atmosphere. Pollution: Pollution is the introduction of harmful or poisonous substances into environment that may cause adverse effects. Q11- Why does the increased level of nutrients in the water affect the survival of aquatic organisms? Power plants give out tiny ash particles which also pollute the atmosphere and they are so harmful that if inhaled can cause various diseases. When there is lack of oxygen then it result into incomplete burning of fuel which results into production of carbon monoxide instead of carbon dioxide. Download NCERT Books, Video Lectures ASK DOUBTS Start Discusssion Free JEE Test Series, Get the most advanced study material and top your exams. Class 9 - Science+Maths Video Paper Solutions, Class 10 - Science+Maths Video Paper Solutions, 11+12 - Physics + Chemistry + Mathematics, 11+12 - Physics + Chemistry + Mathematics (IIT), 11+12 - Physics + Chemistry + Biology (NEET), Class 9th and 10th : Foundation for IIT Physics, Class 9th and 10th : Foundation for IIT Chemistry, How to make the best choice: Science vs Commerce vs Arts, How to Study Effectively- 9 Secrets No One Tells, How to prepare for IIT-JEE this summer - Top 7 proven ways. List of measures that would help your town to ensure the supply of clean to. By impure water, causing changes in acidity, growth of worms, etc mammals are indicators the! 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