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ISC Class XII Board Exam 2020 : Environmental Science

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ISC 12th
Indian School Certificate Examination (ISC), New Delhi

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ENVIRONMENTAL SCIENCE PAPER 1 (THEORY) (Maximum Marks: 70) (Time allowed: Three hours) (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time.) ------------------------------------------------------------------------------------------------------------------------Answer Question 1 (compulsory) from Part I and five questions from Part II, choosing at least one question from each of the Sections A, B and C. The intended marks for questions or parts of questions are given in brackets [ ]. ------------------------------------------------------------------------------------------------------------------------- PART I (20 Marks) Answer all questions. Question 1 (i) Define deep ecology. How is the concept of deep ecology different from shallow ecology? [2] (ii) Mention any two factors influencing the growth of population. [2] (iii) Give any four characteristics of r strategy. [2] (iv) Give any two differences between a national park and a sanctuary. [2] (v) Differentiate between primary pollutants and secondary pollutants. Give one example each. [2] (vi) Give any two socio-economic benefits of cottage industries. [2] (vii) What is food adulteration? Name two of the common food adulterants. [2] (viii) Give the full forms of: (a) MFN (b) EPR [2] (ix) Classify the natural resources based on its distribution, giving examples. [2] (x) What is IPR? State any two categories of IPR. [2] ------------------------------------------------------------------------------------------------------------------------This paper consists of 3 printed pages and 1 blank page. 1220-877 Copyright reserved. Turn over PART II (50 Marks) Answer five questions in all, choosing at least one question from each of the Sections A, B, and C. SECTION A Question 2 (a) What is sustainable development? Explain any five basic principles of sustainable development. [6] (b) Give a biographical sketch of Wendell Berry with special reference to his work on environment. [4] Question 3 (a) What are soil indicators? Name any five types of soil indicators and give one significance of each one of them. [6] (b) What is meant by demographic transition? Explain the first three stages of demographic transition. [4] Question 4 (a) Discuss any six functions of the State Pollution Control Board. [6] (b) Explain any four threats to the ecosystem. [4] SECTION B Question 5 (a) Define sustainable agriculture. Explain any five elements of sustainable agriculture. [6] (b) Write a short note on the privatization of water in Cochabamba. [4] Question 6 (a) What is meant by new urbanism? Discuss any five goals of smart growth in new urbanism. [6] (b) Discuss any two social and two ecological impacts of green revolution. [4] Question 7 (a) (b) What is food preservation and processing? Why do we need it? Discuss any three methods of food preservation and processing. [6] What is meant by food additives? Discuss any three health hazards caused by [4] food additives. ------------------------------------------------------------------------------------------------------------------------2 1220-877 SECTION C Question 8 (a) What is meant by natural capital? What is the importance of preserving it? State the methods of regenerating natural capital. [6] (b) Give four advantages and four disadvantages of GNP. [4] Question 9 (a) Discuss the ecological values of the rain forests of Amazonia. [6] (b) What is Physical Accounting System? What is its aim? State two advantages and two disadvantages of Physical Accounting System. [4] Question 10 (a) What is globalization? Give any five advantages of globalization. [6] (b) Explain any four impacts of hazardous waste. [4] ------------------------------------------------------------------------------------------------------------------------3 1220-877

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