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  • Last Modified 30-08-2022

NCERT Solutions for Class 8 Science Chapter 18

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NCERT Solutions for Class 8 Science Chapter 18: Air and water pollution is one of the important topics to be studied by the Class 8 students to acquire general awareness of the pollution hazards occurring throughout the world. Also, practicing the Class 8 Science Chapter 18 NCERT solutions helps students score good marks in Class 8 final examination and various competitive examinations.

The CBSE NCERT Solutions of Class 8 Science Chapter 18 provided in this article have been prepared by the subject matter experts at Embibe. Students are advised to go through the concepts clearly and then try to answer all the questions given in the NCERT Class 8 Science textbook. Embibe provides over 500+ questions for all the subtopics to prepare for the exams. This will help them clarify their concepts. Students can practice it for free from Embibe. Scroll down to know more.

NCERT Solutions Class 8 Science Chapter 18: Important Topics

Pollution is a serious concern. Therefore, students must be aware of it. Preparing for the Class 8 Science Chapter 18 will not only help them score more but also become aware of the environment. As a result, students can easily go through the theory part and get more marks.

Embibe provides 3D videos, Explainers and Exemplars that can be a great way to prepare for exams. Students must ensure that they focus on every unit carefully so that they can score more marks. The chapter deals with pollution of air and soil. Students who face problems can refer to the materials of Embibe. As a result, the students will be able to stay ahead in their preparation. The study materials are prepared from the best textbooks which can be a great resource for preparing for the exam. At the same time, students must refer to all subtopics as it will be helpful.

Sr NoTopic
18.1Introduction to Pollution
18.2Air Pollution
18.3Greenhouse Effect
18.4Water Pollution

NCERT Solutions for Class 8 Science Chapter 18: Points to Remember

Given below are some points to remember for Class 8 Science Chapter 18:

  • Human activities like deforestation, overpopulation, industrialisation, excessive use of fertilisers and pesticides, creation of cities for housing and transport facilities have led to pollution of air and water.
  • Acid rain refers to the fall down of acids with rain on the earth.
  • Greenhouse effect: Accumulation of excessive carbon dioxide traps large amounts of heat and increases the earth’s temperature.
  • Water pollution is the contamination of water by unwanted substances.
  • Pollution refers to the addition to the environment (air, water and soil) of substances that make it harmful to living organisms.

Students can learn more important points of Class 8 Science Chapter 18 from Embibe.

NCERT Solutions for Class 8 Science Chapter 18: All Chapters

Students can access the NCERT solutions for other chapters of CBSE Class 8 Science from below.

FAQs on NCERT Solutions for Class 8 Science Chapter 18

Q.1: How to download the NCERT Class 8 Science Chapter 18

Ans: Students can access the NCERT Class 8 Science Chapter 18 from Embibe for free.

Q.2: Explain the differences between pure air and polluted air.

Ans: The air is said to be polluted when the composition of air is altered by the addition of harmful substances or gases such as sulfur dioxide, carbon monoxide, nitrogen dioxide, and particulate matter.

Q.3: What are the different ways in which water gets contaminated?

Ans: The water gets contaminated through industrial waste and sewage.

Q.4: Why does the increased level of nutrients in the water affect the survival of aquatic organisms?

Ans: An increase in the level of nutrients in the water body leads to an excessive increase in the population of algae in the water body. When these algae die, they serve as food for decomposers. A lot of oxygen is utilized in this process, consequently decreasing the level of oxygen dissolved in the water body. This, in turn, causes fishes and aquatic organisms to die.

Q.5: Why should I use these NCERT Solutions for Class 8 Science Chapter 18 to prepare for the exams?

Ans: The NCERT Solutions for Class 8 Science Chapter 18 provided here gives simple and stepwise answers to the questions present in the textbook.

Adaptive Practice with Solutions To Help You Ace Important Topics for 8th NCERT Science