Answer ALL questions
PART A – (10×2=20 marks)
1.      What is an Abiotic Environment
2.      What are called endangered species
3.      Mention the effects of Ozone on plants

4.      List the sources of marine pollution
5.      What are renewable resources
6.      Define the term landslide
7.      What is rain water harvesting
8.      What are the objectives of water act
9.      Define the term Nuclear energy
10.  What are the sources of HIV infection
PART B (5×13=65 marks)
11.  (a) (i) Define ecosystem. Give an account of structure and functions of grassland ecosystem.                           (7)
(ii) What is biodiversity? Discuss the values and significance of biodiversity.                        (6)
Or
(b) (i) With a neat sketch discuss the Nitrogen cycle                                                             (6)
     (ii) What do you mean by conservation of biodiversity? State and explain the basic 
           approaches to wild life conservation.                                                                           (7)
12.  (a) (i) Describe the various chemical and photochemical reactions in the atmosphere.          (6)
     (ii) Explain the sources, effects and control measures of noise pollution                           (7)
Or
(b) (i) Write informative notes on water treatment processes.                                                (7)
     (ii) Describe the role of individual in the prevention of pollution.                                    (6)
13.  (a) (i) Describe the causes and effects of deforestation.                                                        (7)
     (ii) What is land degradation? Discuss the factors responsible for land degradation.      (6)
Or
(b) (i) What are the changes caused by agriculture and overgrazing?                                    (6)
     (ii) Discuss the production biogas. Mention its uses.                                                          (7)
14.  (a) (i) What are the objectives of water conservation? How is it carried out?                        (6)
     (ii) What is an earth quake? Enumerate its effects. What measures should be taken to
           Mitigate this disaster?                                                                                                   (7)
Or
(b) (i) Discuss the resettlement and rehabilitation of people, its problems and concerns.       (7)
     (ii) Briefly discuss to salient features of wild life protection act.                                       (6)
15.  (a) (i) Discuss the variation of population among nations.                                                     (6)
      (ii) Write the methods and strategies of imparting value education                                 (7)
Or
(b) (i) Write explanatory notes on women and child welfare                                                  (7)
     (ii) Explain the role of information technology in environment and human health           (6)
PART C (1×15=15 marks)


16.  Write case study report about natural disaster of earthquake.                                                (15)