SSC Worksheet for chapter-9 Natural Resources class 9

Worksheet For class 9

Questions

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1. Which of the following is not an important factor for growth of plants ?
   1. Nutrient content of soil
   2. Distance of water body from the soil
   3. Amount of humus present in the soil
   4. Depth of soil
2. Soil erosion can be prevented by
   1. Raising forests
   2. Excessive use of fertilizer
   3. Deforestation
   4. Overgrazing by animals
3. What would happen, if all the oxygen present in the environment is converted to ozone?
   1. We will be protected more
   2. It will become poisonous and kill living forms
   3. Ozone is not stable, hence it will be toxic
   4. It will help harmful sun radiations to reach earth and damage many life forms.
4. How does the atmosphere act as a blanket?
5. What causes winds?
6. List any three human activities that you think would lead to air pollution.
7. Why do organisms need water?
8. What is soil erosion?
9. How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?
10. Write a note on how forests influence the quality of our air, soil and water resources.