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What do you mean by fossil fuels ? Give ...

What do you mean by fossil fuels ? Give one example of these.

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These are the materials formed form the organisms that died in the remote past and got burred. Example. Coal.
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PRADEEP-NATURAL RESOURCES : OUR ENVIRONMENT-ADDITIONAL QUESTIONS
  1. Define eutrophication.

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  2. Which compound is generally added to petrol to make it burn smoothly i...

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  3. Name atleast one disease that occurs in human beings due to biomagnifi...

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  4. What are the two forms of oxygen found in the atmosphere?

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  5. What is smog ?

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  6. How is ozone layer useful to us ?

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  7. Name the two important biological processes in which air is essential.

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  8. What is the fate of nitrogen gas that goes inside the lungs alongwith ...

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  9. Name two common types of pollutants of air.

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  10. Name the two acids that are present in acid rain.

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  11. What is humus? What are its function?

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  12. What is weatheirng ? Name atlest one fator responsible for weathering.

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  13. What is meant by photochemical fixation of nitrogen ?

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  14. Name two examples of green house gases which contribute maximum toward...

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  15. What is ozone hole ? Where was it first located ?

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  16. What is meant by soil erosion ?

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  17. In which layer of soil profile one would find litter and humus ?

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  18. What is the main constituent in the following types of soil ? (a) Bl...

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  19. What do you mean by fossil fuels ? Give one example of these.

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  20. Name the reservoir for the nutrient elemetnts in (a) gaseous cycles (b...

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