Feb 252014
 

Environment Science (Optional First)

Group ‘A’

Answer any 18 questions from this sub-group. 18×4=72

Physical Aspect

Answer any 7 questions from this sub-group.

1. Explain the statement, “Earth’s surface can be compared with artificial green house.” 4

2. Describe in brief about any two artificial greenhouse gases. 2+2

3. What worldwide efforts have been made for the reduction of carbon dioxide? Write four points. 4

4. What is the role of CFC in ozone layer? List out four effects of ozone layer depletion. 2+2

5. What should be done to control ozone layer depletion? 4

6. Mention any four important points of ozone layer. 4

7. Explain four points of importance of energy. 4

8. Write short notes on: 2+2

  • Natural Gas
  • Energy consumption

Chemical Aspect

Attempt any 2 questions from this sub-group.

9. What is recycling and reuse? How do they help in hazardous waste management? 2+2

10. Describe how the air is polluted due to hazardous waste. 4

11. Mention four effects of hazardous waste on human health. 4

Biological Aspect

Attempt any 3 questions from this sub-group.

12. What is meant by endangered animals? Name 2 mammals, 2 birds and 2 reptiles that are declared endangered in our country. 1+3

13. Describe the role of animals in maintaining balance in ecosystem. 4

14. Why are certain species of animals found in a particular geographic region only? Make list of four birds found in mountain region of our country. 2+2

15. Illustrate four various reasons for the disappearance of animals. 4

Natural Aspect

Answer any two questions from this sub-group.

16. How does wetland contribute in national and local income? 4

17. Differentiate between natural and man-made wetland. 4

18. “Man made wetlands are constructed for various purposes.” Illustrate with examples. 4

Socio-Economic Aspect

Answer any 2 questions from this sub-group.

19. Agriculture provides major source of food and national income. Clarify. 4

20. Explain about two effects of chemical fertilizer on environment. 4

21. Write any two advantages and two disadvantages of pesticides and chemical fertilizers on agriculture. 2+2

Health and Sanitation Aspect

22. “Due to unhealthy environment, various diseases are caused.” Make the statement clear with examples. 4

23. What are the characteristics of a healthy working place? 4

24. “Healthy environment brings healthy life.” Describe. 4

Group ‘B’

Write long answers of any four questions from this group. 4×7=28

25. “Population control helps in better conservation of energy”. Give explanation. Write three ways for conservation of non-renewable energy resources. 4+3

26. “Research centers and industries are the main sources of hazardous wastes but it can be well managed.” Justify your answer with suitable examples. 7

27. Give reason to clarify these statements.

  • Natural disaster causes extinction of wild life. 3
  • Wild animals are advantageous. 4

28. Write four reasons for destruction of wetlands. What are water collected areas used for? 4+3

29. “Due to different topography of Nepal, agriculture system is badly affected.” Give your view. How are organic fertilizers more advantageous than chemical fertilizers? 4+3

30. “Long term radiation can cause somatic and genetic effect on human.” Explain with two examples of each. How does cottage industry contribute in environment protection? 2+2+3


 Posted by at 8:42 am
Feb 252014
 

Environment Science (Optional First)

Group ‘A’

Answer any 18 questions from this sub-group. 18×4=72

Physical Aspect

Answer any 7 questions from this sub-group. 7×4=28

1. What is green house? What are its specific characteristics? 1+3

2. What are green house gases? Explain two of them with examples. 1+3

3. Write any two causes of greenhouse effect and its two impacts of the earth. 2+2

4. Name the different layers of atmosphere? Write down their thickness and significance. 2+2

5. What id depletion of ozone layer? Mention any three factors that are responsible for ozone layer depletion. 2+2

6. Explain in brief about the importance of energy for industrial development. 4

7. Write short notes on: 2+2

  • Energy crisis
  • Energy requirement in Nepal

8. What is meant by fuel? Why is wind energy called a renewable energy resource? Write its uses and advantages. 1+1+2

Chemical Aspect

Attempt any 2 questions from this sub-group.

9. Write any four different sources of hazardous wastes with three examples of each. 4

10. “There should be proper waste management system in research centres to reduce hazardous waste.” Clarify this statement with three suitable examples. 4

11. Write short notes on: 2+2

  • Landfill
  • Incineration

Biological Aspect

Answer any 3 questions from this sub-group.

12. List out four important points of National Park and Conservation Area. 4

13. “For the conservation of animals, control of illegal hunting and forest conservation is necessary.” Clarify it. 4

14. Mention the names of two endangered reptiles and write six major causes for disappearance of animals. 1+3

15. Give detailed information about Musk deer. Prepare your answer on the basis of its introduction, habitat, food, reproduction and life span. 4

Natural Aspect

Answer any two questions from this sub-group.

16. Describe the importance of wetland from religious and cultural view points. Give examples also. 4

17. How do wetlands provide food for human and wild animals? Give two examples of each. 2+2

18. Compare river and pond as source of wetland. 4

Socio-Economic Aspect

Answer any 2 questions from this sub-group.

19. Give introduction of agriculture system in Nepal. 4

20. Compare and contrast the use of technology in agriculture. 2+2

21. List out four proper ways to apply pesticides on agriculture. 4

Health and Sanitation Aspect

Attempt any two questions from this sub-group.

22. “Health is directly related to healthy environment.” Explain. 4

23. Make a list of four health hazards caused due to air pollution and also suggest ways of prevention. 4

24. Mention four safety measures for the workers working in an unsafe industrial area. Also write two effects caused due to carelessness. 2+2

Group ‘B’

Write long answers of any four questions from this group. 4×7=28

25. Describe any five effects of ozone depletion. Explain two ways for its conservation. 5+2

26. Describe three main preventive measures of hazardous wastes and mention two measures to save life. 6+1

27. Explain three causes of extinction of wildlife. Also write the ways of protection of wildlife and describe any two of them. 4+3

28. “Destruction of wetland may cause adverse effect on environment.” Give your views with examples. Mention three policies undertaken for wetland conservation. 4+3

29. How does irrigation of land help in crop growth? Give answer in four points. Describe the importance of agriculture for poultry farming. 4+3

30. How could control of sound pollution reduce environment pollution? Why are clean air and safe drinking water necessary? 4+3


 Posted by at 8:18 am