ISC Class 12 Question Paper 2019 for Environmental Science

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

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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 [4]
differ from Joint Forestry Management?

Question 3
(a) What are life strategies? State their types. Mention any four characteristics of [6]
each of the types stated by you.
(b) Discuss four indicators of water quality and give one significance of each of [4]
them.

Question 4
(a) What are the different techniques of monitoring air quality of a place? Discuss [6]
briefly any two of the methods.
(b) ‘Women empowerment can bring about a major change in human population’. [4]
Discuss.

SECTION B

Question 5
(a) What are the pull and push factors of urbanization? Explain any four negative [6]
impacts of urbanization.
(b) Discuss urban development planning and traffic management methods used in [4]
Curitiba.

Question 6
(a) Discuss the different types of irrigation systems. Explain any four advantages [6]
and any four disadvantages of each type.
(b) What is a dry toilet? How does it work? [4]

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Question 7
(a) Discuss the problems related to food security in the third world countries. Give [6]
any two solutions to tackle these problems.
(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 [4]
control ozone layer depletion.

Question 9

(a) Differentiate between free trade and protectionism. State any two advantages [6]
and any two disadvantages of each.
(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 [6]
two disadvantages of Cost Benefit Analysis.
(b) Discuss the case study of aquaculture in India to understand the impact of free [4]
trade.

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