D. C. Pant 💻

Class – 8 Subject – Science Chapter – 2 : Microorganisms : Friends and Foe Exercise    (Question and Answer)   Question 1. Fill in the blanks. (a) Microorganisms can be  seen with the help of a _ microscope _. (b) Blue green algae  fix _ nitrogen _ directly from air and enhance fertility of soil. (c) Alcohol is produced with the help of _ yeast _. (d) Cholera is  caused by _ bacteria _.   Question 2. Tick the correct answer. (a) Yeast  is used in the production of (i) sugar                                    (ii) alcohol  (iii) hydrochloric acid           (iv) oxygen   Answer - (ii) Yeast   (b) The following is an  antibiotic (i) Sodium bicarbonate.   (ii) Streptomycin (iii) Alcohol.                     ...

Subject – Science         Class - 8 Chapter b- 1 : Crop Production and Management Exercise Question 1. Select the correct word from the following list  and fill in the blanks. float, water, crop, nutrients, preparation (a) The same kind of plants grown and cultivated  on a large scale at a place is called_crop_. (b) The first step before growing crops is _preparation_ of the  soil. (c) Damaged seeds would _float_ on top of water. (d)  For growing a crop, sufficient sunlight and _water_ and _nutrients_ from the  soil are essential.     Question 2. Match items in column  A  with those in column  B. A B (i)                  Kharif crops Paddy and maize (ii)                 Rabi...