16. Why do we need non-systemic sources for energy production?  Reveal the two main cars. 

 

17, State two methods for energy production from the sea, 

18. Name the measures to reduce the pollution of the atmosphere caused by the combustion of Armi fuel.  Science Sample.1 X 11 

19. What is the role of plane mirror and glass plane in solar cooker? 

 

20, Explain the three benefits of solar cell.  

21. What is biomass?  How is biogas produced from it? 

 

22, state the limits of energy generation from wind.  

23. How is nuclear energy produced nowadays?  Explain briefly. 

 

24. How can solar energy be used?  State the two limits of solar energy use.  Explain how it can be prevented,.  

25. List only conventional (prannaligat) and non-conventional (nonpranalig 7) G sources.  Describe in detail the workings of one of the unconventional energies.  

26, Why the need to use unconventional energy sources?  Explained the ways of producing energy from the sea.  

27. Describe the effects of using Ami fuel on the environment.  Unconventional of energy.  Explain ways to reduce pollution caused by other sources, including solar, 

28. Energy from different energy sources is basically called energy from the sun. Do you agree with this?  Explain the correct reason for your answer.  (Confirm correct.) 

29, What is biomass?  Describe the principle of biogas plant and the method of combustion with a nominal diagram,