Answer sheets of meritorious students of class 12th’ 2012 M.P Board – All Subjects
February 14, 2013
39 Insightful Publications
NCERT Solutions for Class 8 Science Chapter 18
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 No | Topic |
|---|---|
| 18.1 | Introduction to Pollution |
| 18.2 | Air Pollution |
| 18.3 | Greenhouse Effect |
| 18.4 | Water 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.
- 1st Chapter– Crop Production and Management
- 2nd Chapter – Microorganisms: Friend and Foe
- 3rd Chapter – Synthetic Fibres and Plastics
- 4th Chapter – Materials: Metals and Non-Metals
- 5th Chapter- Coal and Petroleum
- 6th Chapter– Combustion and Flame
- 7th Chapter – Conservation of Plants and Animals
- 8th Chapter – Cell – Structure and Functions
- 9th Chapter – Reproduction in Animals
- 10th Chapter – Reaching the Age of Adolescence
- 11th Chapter – Force and Pressure
- 12th Chapter – Friction
- 13th Chapter – Sound
- 14th Chapter – Chemical Effects of Electric Current
- 15th Chapter – Some Natural Phenomena
- 16th Chapter – Light
- 17th Chapter – Stars and the Solar System
- 18th Chapter – Pollution of Air and Water
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.
