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NCERT TELUGU-NOT FOR BREATHING-NOT FOR DINKING -EXERCISE
- How much water is required for drinking ?
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- Do you find any change in colour and smell of water in some water samp...
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- Which of the following is basic in nature ?
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- Are there any visible pollutants in the water sample ?
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- Name the natural disasters which may cause air pollution.
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- Define primary and secondary pollutants
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- What is eutrophication?
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- What are the natural activities which lead to pollution in air?
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- How is biodegradable waste a source of water pollution?
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- How do human activities contribute to pollution of air?
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- Write some pollutants and their sources.
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- What are the effects by air pollution?
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- How can air pollution be reduced?
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- What precautions can be taken to control water pollution?
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- The atmosphere contains about - --% of oxygen
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- 0.033% of atmosphere is
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- Which of the following is a natural disaster?
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- Substances responsible for disturbing naturally occurring balance are
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- Decay of organic matter releases ----gas into the air
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- Decay of organic matter lying under water releases ----gas
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