Name of the University : Netaji Subhas Open University
Name of the Exam : BDP Term End Exam
Document Type : Sample Question Paper
Year: 2016
Subject: Environmental Studies

Website : http://www.wbnsou.ac.in/student_zone...c2015-June2016
Download Model/Sample Question Papers: http://www.indianjobtalks.com/uploads/76283-ENVS.pdf

BDP Term End Environmental Studies Question Paper :
Time : 2 Hours
Full Marks : 50
Instructions To Candidates :
1. This is a Question-cum-Answer booklet.
2. Answers are to be written in the space provided under each question and nowhere else.
3. In no circumstances may you take this Questioncum- Answer booklet from the Examination Room.
4. The questions are printed in Bengali and English versions. Candidates should answer wholly in Bengali or English and not partly in Bengali and partly in English. In case of any doubt or discrepancy in between the two versions, Bengali version will prevail.

1. Tick the correct answer : 1 × 10 = 10
(a) What are the components of 'SIAL' layer ?
Si & Al
S & Al
I & Al

(b) In an ecosystem, the flow of energy is
bidirectional
cyclic
unidirectional

(c) What is the end product of nitrification ?
NO2
NH4 – N
NO3

(d) During road construction the smoke produced due to melting of bitumen coal, contains a chemical substance known as
lead oxide
benzapyrine
sulphur dioxide

e) Amoebiasis is caused by
protozoa
helminths (worms)
bacteria

(f) What percentage of hydrosphere covers rivers and lakes ?
0·026
0·025
0·024

(g) The upright pyramid of member is absent in ecosystem of lake grassland pond
lake
grassland
pond

(h) Which gas is emitted due to decomposition of living matter
CO
CO2
CH4

(i) Biomass is increased when
Pg > R
Pg < R
Pg = R

(j) What is 'umbrella of earth' ?
ozone layer
stratosphere layer
troposphere layer

2. Answer briefly any ten of the following questions in the given four lines : 2 × 10 = 20
(a) What is the primary reason for the fast growth of human population ?
(b) What do you mean by 'Ozone hole over Antarctica' ?
(c) What is La Nina ?
(d) What are the sources of CO2 gas ?
(e) Name four control measures of noise pollution.
(f) What is the impact of oil-spill pollution in sea on birds ?
(g) State two each of direct and indirect sources of water pollution.
(h) What is the significance of denitrification in nitrogen cycle ?
(i) What is 'trophic level' ? Write with example.
(j) What are Aurora Borealis and Aurora Australis ?

3. Write short notes on any five of the following in the given eight lines : 4 × 5 = 20
(a) Problems of human health in India
(b) Biodiversity in India
(c) Food chain
(d) Air pollution control measures
(e) Any five guidelines of sustainable development
(f) Silent Valley Movement