NCERT Exemplar Class 8 Science Chapter 18 Solutions: Pollution of Air and Water

NCERT Exemplar Solutions Class 8 Science Chapter 18 ‘Pollution of Air and Water’ provide you with in-depth information about air and water pollution. Have you ever noticed that the beauty of the Taj Mahal is being threatened by air pollution? You would also know about some methods that can be done to control water and air pollution. The environment is getting polluted each day. To know how you can save it, therefore this chapter of NCERT Exemplar Class 8 Science is somewhere essential for you. 

The chapter contains 32 questions divided into different sets of exercises. If you practice all the NCERT Exemplar Class 8 Science Problems for Chapter 18, then you don’t need to worry about the preparation of CBSE as well as other competitive exams. NCERT Exemplar Class 8 Science is one of the most recommended practice books that help in scoring the best marks in the final exams. Chapter 18 covers different topics like air pollution, how does air get polluted, the greenhouse effect, water pollution, how does water get polluted, etc. 

Important Topics for NCERT Exemplar Solutions Class 8 Science Chapter 18 – Pollution of Air and Water

Air Pollution 

You can easily survive without food for some time. But can you survive without air? This simple fact easily tells us how important air is in our lives. Air is a mixture of gases. It has 78% nitrogen and 21% oxygen.  When the air gets contaminated by unwanted substances that cause a harmful effect on living as well as non-living things. This refers to air pollution. 

You will know in the chapter about how the air gets polluted? Air pollutants play a major role in polluting the air. Air pollutants are the substances that contaminate the air. These types of substances come from smoke, dust, volcanic eruptions, factories, power plants, etc. 

Air pollution is highly responsible for different respiratory problems. In the chapter, you will know the different pollutants that cause air pollution. 

Case Study- The Taj Mahal 

Under this topic, you will know about the Taj Mahal which is India’s famous tourist attraction. You will get to know how the Taj Mahal is a matter of concern and how a non-living thing that is made of marble is affected by air pollution.

The Greenhouse Effect
Under this section, you will learn about global warming that is a serious threat to nature. Global warming causes sea levels to rise dramatically. Global warming also results in white ranging effects on drain floor patterns, forest, agriculture, plants, and animals. In this chapter, you will learn about the greenhouse effect that refers to the trapping of radiation by the atmosphere of the earth. Also, you will know about different greenhouse guesses. The chapter tells you some precautionary measures to reduce global warming.

Other topics discussed in the Chapter are:

  • Water pollutant
  • Water pollution
  • How does water get polluted
  • Ganga action plan
  • What is potable water and how is water purified
  • What can be done to reduce water pollution

Exercise Discussion of NCERT Exemplar Class 8 Science Chapter 18 – Pollution of Air and Water

  • The set consists of 12 multiple choice questions on topics like water pollution, combustion of fuels, the process of purifying water, sources of air pollution, etc. 
  • The second set consists of 6 very-short answer questions in which you have to give answers in 1 word on topics like acid rain and sources of air and water pollution. 
  • The 3rd set consists of 6 short answer questions that are a combination of fill in the blanks, match the column or 1 liner answers. 
  • The 4th set has 8 long answer questions in which you need to answer in detail about different topics of the chapter as asked in the questions such as CFCs, global warming, reduce, recycle and reuse of water and the importance of planting trees. 

Benefits of NCERT Exemplar Solutions Class 8 Science Chapter 18 – Pollution of Air and Water by Instasolv

To make your study time comfortable and easier, Instasolv presents you with this facility of NCERT Exemplar problems with solutions for Class 8 Science Chapter 18. Studying with the team of Instasolv provides you with several benefits like you won’t have to carry your heavy books with you. We will make the chapter interactive by providing supporting diagrams and flowcharts in the solutions. You can easily find solutions to all the Problems in NCERT Exemplar Class 8 Science Chapter 18.