SEBA Class 8 Science Important Chapter 9 Pollution of Air And Water

SEBA Class 8 Science Important Chapter 9 Pollution of Air And Water Solutions English Medium As Per SEBA New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters SEBA Class 8 General Science Additional Solutions and select need one. SCERT Important Solutions For Class 8 General Science Download PDF. Important Notes for Class 8 Science SCERT.

SEBA Class 8 Science Important Chapter 9 Pollution of Air And Water

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. Assam SEBA Board Class 8 Science Additional Question Answer are part of All Subject Solutions. Here we have given SCERT Class 8 General Science Important Notes for All Chapters, You can practice these here.

Pollution of Air And Water

Chapter: 9

PART – I

IMPORTANT QUESTION ANSWER

A. Very Short Type Question & Answer:

1. What is air pollution?

Ans: Air pollution is the contamination of the air with harmful substances like smoke, gases, and particulate matter, which can harm living organisms.

2. What causes air pollution?

Ans: Air pollution is caused by both natural sources like forest fires and human activities such as vehicle emissions, industrial waste, and burning fuels.

3. What is the greenhouse effect?

Ans: The greenhouse effect occurs when gases like carbon dioxide trap heat in the Earth’s atmosphere, leading to global warming.

4. How does air pollution affect the Taj Mahal?

Ans: Air pollution causes acid rain, which corrodes the marble of the Taj Mahal, a phenomenon known as “Marble cancer.”

5. What are greenhouse gases?

Ans: Greenhouse gases like carbon dioxide, methane, and nitrous oxide trap heat in the atmosphere, contributing to global warming.

6. What measures have been taken to reduce air pollution in Delhi?

Ans: Delhi has switched to cleaner fuels like CNG and unleaded petrol, reducing the city’s pollution.

7. What is water pollution?

Ans: Water pollution occurs when harmful substances such as sewage, chemicals, and waste materials mix with water, degrading its quality.

8. How does industrial waste contribute to water pollution?

Ans: Industrial waste contains harmful chemicals and heavy metals, which contaminate water bodies when discharged untreated.

9. What is the impact of water pollution on health?

Ans: Water pollution can cause diseases like cholera, typhoid, and dysentery, which affect human health.

10. How can air and water pollution be reduced?

Ans: Reducing pollution can be achieved by using cleaner fuels, reducing industrial emissions, promoting afforestation, and treating waste before disposal.

B. Fill in the Blanks:

1. Air pollution is caused by ________ and ________ activities.

Ans: Natural, human.

2. Carbon dioxide is a ________ gas responsible for the greenhouse effect.

Ans: Greenhouse.

3. The Taj Mahal is being damaged by ________ rain.

Ans: Acid.

4. ________ water is a poor conductor of electricity.

Ans: Distilled.

5. The Ganga is one of the ________ most endangered rivers due to pollution.

Ans: World’s.

C. True or False:

1. Air pollution only affects living organisms.

Ans: False.

2. Deforestation contributes to the increase in carbon dioxide levels.

Ans: True.

3. Water pollution only affects aquatic life.

Ans: False.

4. The greenhouse effect is caused by excess carbon dioxide in the atmosphere.

Ans: True.

5. The Taj Mahal’s marble has been discolored by the effects of air pollution.

Ans: True.