ICSE Worksheet for chapter-10 Natural Resources class 9

Worksheet For class 9

Find ICSE Worksheet for chapter-10 Natural Resources class 9

CLASS-9

BOARD: ICSE

BIOLOGY Worksheet - 10

TOPIC: Natural Resources

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1. The factor responsible for depletion of the ozone layer is
   1. Excessive use of automobiles
   2. Excessive use of man-made compounds containing both fluorine and chlorine
   3. Excessive formation of industrial units
   4. Excessive deforestation
2. Processes which is not involved in carbon cycle
   1. Photosynthesis
   2. Burning of fossil fuels
   3. Transpiration
   4. Respiration
3. Each chlorine molecule can attack and destroy as many as _______ ozone molecules.
   1. 1000
   2. 100
   3. 100000
   4. 1000000
4. What are biogeochemical cycles?
5. Define Nitrification and Denitrification.
6. Discuss the consequences of the increase in the concentration of carbon dioxide and other Green House gases in the atmosphere.
7. Explain the ‘Nitrogen Cycle.
8. How can we stop Ozone depletion?
9. What are the different states in which water is found during the water cycle?
10. What is the greenhouse effect?