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Class 8 Practice – Level 2 – Set 1 – Pollution of Air and Water
Total questions: 25
1.
Which of the following is a major source of sulfur dioxide in the atmosphere?
Vehicles
Industrial processes
Natural gas combustion
Residential heating
None
2.
Water Pollution Effects Which pollutant is primarily responsible for the spread of cholera?
Nitrates
Lead
Pathogenic bacteria
Phosphates
None
3.
The Air Quality Index (AQI) is used to:
Measure temperature
Determine rainfall
Measure humidity
Assess air pollution levels
None
4.
What is a bioremediation technique used for?
Heating water
Using microorganisms to clean up pollutants
Filtering sand from water
Adding chemicals to purify water
None
5.
Which gas contributes to the greenhouse effect?
Nitrogen
Oxygen
Argon
Methane
None
6.
What is one consequence of heavy metal contamination in water?
Decreased reproductive rates in aquatic life
Increased fish health
Improved water quality
Enhanced biodiversity
None
7.
What is one benefit of using renewable energy sources?
Increased greenhouse gas emissions
Reduced dependence on fossil fuels
Higher pollution levels
Increased deforestation
None
8.
What is the primary purpose of sedimentation in water treatment?
To kill bacteria
To add minerals
To remove suspended solids
To enhance flavor
None
1 out of 8
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