Pollution is the release of hazardous materials into the environment. These hazardous materials are referred to as pollutants. Pollutants may be naturally occurring, such as volcanic ash. They can also be caused by human activity, such as factory runoff or trash. Pollutants have a negative impact on the quality of the air, water, and land.
Air and Water pollution both are very harmful to human existence on this planet. Air and water are the most precious natural resources which are present in abundance but we misuse and abuse them. The pollution in any of these has a serious effect on the lives of humans and animals alike.
Download PDF of Class 8 Chemistry Worksheet on Chapter 18 Pollution of Air and Water – Set 1
CBSE Class 8 Chemistry Worksheet Chapter 18 Pollution of Air and Water – Set 1
Q1. The government has already taken action against air pollution by introducing:
a.) Wind energy
b.) Solar energy
c.) Renewable energy
d.) All of the above
Q2. Gases like methane, nitrogen oxide, sulphur dioxide and carbon dioxide are also called ___.
a.) Acidic gases
b.) Greenhouse gases
c.) Noble gases
d.) None of the above
Q3. Boiling kills the germs present in the ___.
a.) Air
b.) Water
c.) Body
d.) Soil
Q4. Ganga action plan was aimed to:
a.) reduce the pollution level in the river.
b.) increase the pollution level in the river.
c.) reduce the water level of the river.
d.) increase the water level of the river.
Q5. The greenhouse effect is mainly due to which gas?
a.) NO2
b.) SO2
c.) CO2
d.) CH4
Q6. Fill in the blanks:
a.) SPM stands for ___.
b.) The formula for ozone is ____.
c.) Enrichment of water bodies with nutrients like nitrates and phosphates is known as ____.
d.) Planting trees is known as ____.
e.) The phenomenon of acid rain corroding monuments made of marble is known as ___.
Q7. State True or False:
a.) There is no alternative for fossil fuels.
b.) Wastewater from agriculture does not cause water pollution.
c.) CNG contains sulphur which on burning forms sulphur dioxide.
d.) Natural gas is one of the pollutants of air pollution.
e.) The atmosphere prevents the earth from the UV radiation of the sun.
Q8. Define air pollution and water pollution.
Q9. What is Van mahotsava?
Q10. Explain how chlorofluorocarbons are harmful to us.
Q11. What is global warming?
Q12. What are the causes of water pollution?
Q13. We should plant trees and nurture the ones already present in the neighbourhood. Why?
Q14. How does the burning of fossil fuels affect the carbon dioxide level in the atmosphere?
Q15. What are the harmful effects of water pollution?
Q16. Differentiate between:
a.) Pure air and polluted air.
b.) Clean water and Potable water.
Q17. How can you prevent air pollution?
Q18. Write a short note on the conservation of water.
Q19. How can we reduce, reuse and recycle water?
Q20. What is acid rain? How does it affect both living and non-living things?
Download PDF to access answers of Chemistry Worksheet for Class 8 Chemistry Chapter 18 Pollution of Air and Water Set – 1.
Download PDF
Read Also:
- Causes of Water Pollution
- Prevention of Air Pollution
- Air Pollution Questions
- Class 8 Chemistry Chapter 18 – Pollution of Air and Water Important Questions with Answers
Recommended Videos
Air and Water Pollution
