CBSE Worksheet for chapter-10 Natural Resources class 9

Worksheet For class 9

Find CBSE Worksheet for chapter-10 Natural Resources class 9

CLASS-9

BOARD: CBSE

BIOLOGY Worksheet - 10

TOPIC: Natural Resources

For other CBSE Worksheet for class 9 Science check out main page of Physics Wallah.

1. The main biological process that returns oxygen to the atmosphere is
   1. Burning of fossil fuels
   2. Photosynthesis
   3. Respiration
   4. Rainfall
2. One of the following processes is not a step involved in the water cycle operating in nature.
   1. Evaporation
   2. Snowfall and rain
   3. Transpiration
   4. Photosynthesis
3. 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
4. What are biogeochemical cycles?
5. What is ‘Water Cycle’? Explain the process of water cycle.
6. Write a short note on ‘Nitrogen Fixation’
7. How can we stop Ozone depletion?
8. What are the different states in which water is found during the water cycle?
9. What is the greenhouse effect?
10. Discuss the consequences of the increase in the concentration of carbon dioxide and other Green House gases in the atmosphere.