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Gauhati University Question Papers: Environmental Studies (Nov-Dec’ 2014)

Full Marks: 75
Time: 3 hours
(The figures in the margin indicate full marks for the questions)
1. (a) Answer in one word:                                                                              1x5=5

1)         Water segment of the environment.
2)         Biotic components of ecosystem which can produce their food themselves.
3)         Disease caused by the presence of excessive fluoride (> 1.50 ppm) in drinking water.
4)         A protected area aimes at conservation of some animals where certain human activities are permitted.
5)         Gas produced from microbial breakdown of solid waste.
(b) Fill in the blanks:                                                                                  1x5=5
1)         The process of accumulation of non-biodegradable substance in a body is called _______.
2)         HIV is the short form of _______.
3)         The UN Conference on human environment was held at _______ in 1972.
4)         _______ is observed as ozone layer day every year.
5)         The groups of biotic component of an ecosystem are producer, customer and _______.
(c) Choose the correct answer:                                                                         1x5=5
1)         Most of the landslides occurring during rainy season are mainly natural/anthropogenic.
2)         The great earthquake in Assam occurred in 1951/1895/1950.
3)         From the mega biodiversity point of view, the position of India is 12th/11th/10th in the world.
4)         Percentage of nitrogen (Vol/Vol) in the atmosphere is approx 21/78.
5)         Solar energy is a renewable/non-renewable source of energy.
2. Distinguish between the following:                                                     3x5=15
a)         Rare and vulnerable species.
b)         Weather and climate.
c)          In-situ and ex-situ conservation of biodiversity.
d)         Primary and secondary pollutants.
e)         Troposphere and stratosphere.
3. Answer any three questions from the following:
a)         What do you mean by natural resources? How are they classified? Give examples.                                                                                                                                           1+3+1=5
b)         What is environment? What are the different segments of the environment? Discuss each of them briefly.                                                                               1+3+1=5
c)          What do you mean by deforestation? Discuss the major causes and consequences of deforestation.                                                                                                          1+2+2=5
d)         What is ecosystem? Discuss the basic structure of ecosystem.                    1+4=5
e)         Define the term biodiversity. Write a brief note on value of biodiversity.          1+4=5
4. Write short notes on any three of the following:                                     3x5=15
a)         Rainwater harvesting.
b)         Disaster management.
c)          Noise pollution.
d)         Dam-benefits and problems.
e)         Chipko movement.
5. Answer any three questions from the following:
a)         What do you mean by solid wastes? Discuss four important methods for their management.                                                                                                                  1+4=5
b)         What is water pollution? Discuss the main causes of water pollution.            1+4=5
c)          What do you mean by sustainable development? Why is this concept so important today?                                                                                                                     2+3=5
d)         Explain the terms – food chain, food web and tropic level.                 1+2+2=5
e)         What are the mineral resources of Northeast India? Discuss the environmental problems associated with their over exploitation.                                                      2+3=5


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