Environmental Studies Paper-1

 Environmental Studies (Qualifying Paper) 
Compulsory Course on Environmental Studies for Undergraduates of University of Delhi [One Semester]

The Question paper contains 4 printed pages | 676

B.Sc/B.Sc(Hons.)

ES-111 - Environmental Science

Time - 2 Hours | Maximum Marks-45

(Write your Roll No. on the top of immediately on receipt of this question paper)

Answer Section A and B on separate answer books.

**Section A**

Answer Three questions including

Question No. 1, which is compulsory.

1. (a) Expand any five of the following terms:  **5**

(i) CSE

(ii) IUCN

(iii)LPG

(iv)UNDP

(v) MAB

(vi) UNCED

(b) Define any five of the following terms:  **5**

(i) Conservation

(ii) Biomass

(iii) Ecosystem

(iv) Desertification

(v) Sustainable Development

(vi) Green House Effect

(c) Write a brief account of environmental education. **2½**

2. What is biogeochemical cycle? Describe the role of cyanobacteria in this cycle in nature. **5**

3. (a) Explain the term Biodiversity in accordance with convention of biological diversity, 1992. **2½**

    (b) A typical tree provides $1982200 worth of oxygen, clean air, fertile soil, erosion control, water recycling, wild life habitat, toxic gas moderation etc. What is this known as in relation to biodiversity value?  **2½**

4. List the major causes and consequences of deforestation. **5**

5. Write an account of food chain in a typical ecosystems. Distinguish between food chain and food web. **5**

** Section B**

Answer Three questions in all, including

Question No. 1 which is compulsory.

1. (a) Define any five of the following: **5**

(i) Seismic zone;

(ii) Famine;

(iii) Incineration;

(iv) Biotic Potential;

(v) Salinization;

(vi) Exotic Species.

 

   (b) Differentiate between any five of the following: **5**

      (i) Troposphere and Stratosphere;

      (ii) Point Source Solution and Non-Point Source Solution;

      (iii) EL Nino and La Nina

      (iv) Growth curve and growth rate curve

      (v) Bituminous and Anthracite Coal

      (vi) Conservation tillage farming and conventional tillage farming.

(C) When do you observe wild life week? **1**

(d) Name the three endangered animals. **1½**

2. Describe the cause and consequences of climate change. **5**

3. What are hazardous wastes? Discuss their source of origin and methods of disposal. **5**

4. Write a short note on any two of the following:

(a) Earth quack

(b) Noise Pollution

(c) Radioactive Pollution

5. Explain the importance of:

(a) Solar Energy

(b) Water shed management