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ISC Class XII Board Exam 2019 : Environmental Science Paper 1 (Theory)

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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) State the basic principles of stewardship of land. [2] (ii) Give any two impacts of genetic erosion on ecosystem. [2] (iii) Define carrying capacity. State any two factors that determine the carrying capacity of [2] an ecosystem. (iv) Give any two scarce resources which are diverted to make luxury goods. [2] (v) List any two benefits of local market to the villagers. [2] (vi) Distinguish traditional agriculture from modern agriculture. [2] (vii) List any two ecological impacts of the Transnational Companies. [2] (viii) Mention any two chemical indicators of soil quality. [2] (ix) Give two objectives of Basel Convention. [2] (x) Give the full forms of: [2] (a) IPR (b) GNP ------------------------------------------------------------------------------------------------------------------------This paper consists of 3 printed pages and 1 blank page. 1219-877 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 WWF? List the goals and strategies put forth by WWF. [6] (b) What is social forestry? Mention any four types of social forestry. How does it differ from Joint Forestry Management? [4] Question 3 (a) What are life strategies? State their types. Mention any four characteristics of each of the types stated by you. [6] (b) Discuss four indicators of water quality and give one significance of each of them. [4] Question 4 (a) What are the different techniques of monitoring air quality of a place? Discuss briefly any two of the methods. [6] (b) Women empowerment can bring about a major change in human population . Discuss. [4] SECTION B Question 5 (a) What are the pull and push factors of urbanization? Explain any four negative impacts of urbanization. [6] (b) Discuss urban development planning and traffic management methods used in Curitiba. [4] Question 6 (a) Discuss the different types of irrigation systems. Explain any four advantages and any four disadvantages of each type. [6] (b) What is a dry toilet? How does it work? [4] ------------------------------------------------------------------------------------------------------------------------2 1219-877 Question 7 (a) Discuss the problems related to food security in the third world countries. Give any two solutions to tackle these problems. [6] (b) Mention any eight main features of the Food Security Law 2013. [4] SECTION C Question 8 (a) What is meant by defensive expenditure? Explain its purpose and importance. [6] (b) What is ozone layer? How does it get depleted? State any two steps taken to control ozone layer depletion. [4] Question 9 (a) Differentiate between free trade and protectionism. State any two advantages and any two disadvantages of each. [6] (b) State the two types of externalities. Give two examples of each type. [4] Question 10 (a) What is meant by Cost Benefit Analysis? Mention any three advantages and two disadvantages of Cost Benefit Analysis. [6] (b) Discuss the case study of aquaculture in India to understand the impact of free trade. [4] ------------------------------------------------------------------------------------------------------------------------3 1219-877

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