IV. Short Answer Type – I   ( any Eight) :                                      8 X 2 = 16 30. What is irrigation?

31. What are the major groups of microrganisms?

32. Describe the characteristics of coke?

33. Give two example to show that plastics are non – corrosive in nature?

34. Define acid rain.

35. What is metamorphosis?

37.What are audible and inaudible sound?

38. Define cataract. please I give you brainlest and 16 point ​