Pollution and Conservation Quiz - ICSE Class 8 Science
Free practice quiz: Pollution and Conservation (ICSE Class 8 Science). 49 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
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Which of the following is a non-biodegradable pollutant that persists in the environment for hundreds of years, often entering the food chain through ingestion by marine life?
- Leaves and food scraps
- Plastic bottles and bags
- Newspaper and cardboard
- Cotton fabric scraps
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Answer: B. Plastic bottles and bags
Plastic is a synthetic material that does not readily decompose in the natural environment. It breaks down into smaller pieces, but the chemical structure remains, leading to long-term pollution and potential harm to wildlife.
Deforestation, the clearing of forests, contributes to several environmental problems. Which of the following is a direct consequence of large-scale deforestation?
- Increased absorption of atmospheric carbon dioxide
- Decreased soil erosion and landslides
- Loss of habitat for wildlife and increased soil erosion
- Improved water quality due to reduced leaf litter
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Answer: C. Loss of habitat for wildlife and increased soil erosion
Forests provide habitats for countless species. Their removal leads to habitat loss and fragmentation. Tree roots anchor the soil, so deforestation exposes soil to erosion by wind and rain, increasing the risk of landslides.
Which of the following energy sources is considered a renewable energy source and is also a form of conservation of fossil fuels?
- Coal
- Natural gas
- Solar energy
- Petroleum
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Answer: C. Solar energy
Solar energy is derived from the sun and is a renewable resource, meaning it is replenished naturally. Utilizing solar energy reduces the demand for fossil fuels like coal, natural gas, and petroleum, which are finite and contribute to pollution.
The burning of fossil fuels releases particulate matter, which are tiny solid or liquid particles suspended in the air. What is a significant health impact of inhaling fine particulate matter?
- Improved lung function
- Reduced risk of asthma attacks
- Respiratory and cardiovascular problems
- Enhanced immune system response
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Answer: C. Respiratory and cardiovascular problems
Fine particulate matter (PM2.5) can penetrate deep into the lungs and even enter the bloodstream, causing inflammation and damage to the respiratory and cardiovascular systems, leading to conditions like asthma, bronchitis, heart attacks, and strokes.
Which of the following types of pollution is most directly linked to the destruction of coral reefs and the acidification of oceans?
- Air pollution from factories
- Noise pollution from shipping
- Plastic pollution
- Carbon dioxide emissions leading to ocean acidification
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Answer: D. Carbon dioxide emissions leading to ocean acidification
The increasing concentration of atmospheric CO2 leads to ocean acidification as the oceans absorb excess CO2. This acidification disrupts the formation of calcium carbonate, vital for coral skeletons and the shells of many marine organisms, leading to coral bleaching and reef degradation.