2012
ENVIRONMENTAL STUDIES
Full Marks: 75
Time: 3 hours
(The figures in the margin indicate full marks for the questions)
1. (a) Fill in the blanks: 1x5=5
1) The gas responsible for Bhopal Gas Tragedy 1984 is _______.
2) Rio conference on Environment and Development was held in the year _______.
3) _______ is observed as world environment day.
4) The groups of biotic component of an ecosystem are producer, consumer and _______.
5) The full form of WHO is _______.
(b) Write the technical terms for each of the following statements: 1x5=5
1) Over-nourishment of water bodies due to excessive nitrates and phosphates.
2) A biological community and its physical environment exchanging matter and energy.
3) A protected area aimed at betterment of wildlife but where human activities are not allowed.
4) The land area from which water flows under gravity into river or sea.
5) Scientific study of human population.
2. Distinguish between: 2x5=10
a) Primary and secondary pollutants.
b) Weather and climate.
c) Rate and vulnerable species.
d) Wetland and wasteland.
e) Troposphere and Stratosphere.
3. Answer any three questions from the following:
a) Discuss the multidisciplinary nature of environmental studies. 5
b) What do you mean by natural resources? How are they classified? Give examples. 1+4=5
c) What do you mean by ecosystem? What are the biotic and Abiotic components of an ecosystem? Explain. 1+4=5
d) What are ex-situ and in-situ conservation of biodiversity? Explain with examples. 5
e) What is noise pollution? Discuss the measures to control noise pollution. 1+4=5
f) What is rain water harvesting? What are the objectives of rain water harvesting? 2+3=5
4. Answer any four questions from the following:
1) What do you mean by deforestation? Discuss the major causes and consequences of deforestation. 2+4+4=10
2) What are the mineral resources of northeast India? Discuss the environmental problems associated with their over exploitation. 3+7=10
3) Explain the terms – food chain, food web and ecological pyramids. 3+3+4=10
4) What is biodiversity? Mention the major threats to biodiversity and explain them briefly. 2+2+6=10
5) What do you mean by water pollution? What are the different causes of water pollution? Explain. 2+8=10
6) What do you mean by disaster management? What management strategy you can adopt during flood? 4+6=10
7) What do you mean by sustainable development? Trace the evolution of this concept. Why is this concept so significant today? 3+3+4=10
8) Write short notes on:
a) Green House Effect.
b) Role of an individual in conservation of natural resources.
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