19.Name the parts of Flame:- (i)In which unburnt carbon particles are present. (ii) Which is hottest? (iii) In which complete combustion happens. 3 20.(i)Define the term Electroplating (ii)Write any two uses of electroplating. 1+2 21.(i)Write two ways to protect yourself when an earthquake strikes while you are at home. (ii)What is the other name of weak zones present in earth crust? (iii) What do you mean by seismic waves? 3 OR Suggest three measures to protect ourselves from lightning? 22. (i) While testing the sea water and tap water with the help of tester a boy observes more compass deflection in case of sea water as compared to tap water .Explain the reason for above cause in your own words. (ii) How can we convert distilled water into good conductor? 3 OR Is it safe for an electrician to carry out electrical repairs out door during heavy downpour? Explain. 23 Answer the following i)Name the process of fusion of gametes ii) Name two methods of asexual reproduction iii)Another term used for fertilised eggs iv)The type of fission in Amoeba. v) Name two animals in which fertilisation is external 5 24 (i) A pendulum oscillates 40 times in 4 seconds. Find the time period and frequency (ii) List any four sources of noise pollution in your surrounding. 3+2 (i)Explain the term global warming. 25. (ii) Write any two harmful effects of global warming. (iii) What is acid rain ? (iv) Name any two pollutants which make rain water acidic. 5 26.(i)Differentiate between contact and non contact force and give two examples of each. (ii) Define pressure.Give its unit. 3+2 OR (i)Define force (ii)Name three effects of force? iii)What is atmospheric pressure? 27.(i)Draw the diagram of human eye and label any four parts. 5 (ii) How can you take care of your eyes ? *(Exclusively for visually impaired: (i) Write the role of pupil, iris and retina. (ii) How can you take care of your eyes ?)
19.Name the parts of Flame:- (i)In which unburnt carbon particles are present. (ii) Which is hottest? (iii) In which complete combustion happens. 3 20.(i)Define the term Electroplating (ii)Write any two uses of electroplating. 1+2 21.(i)Write two ways to protect yourself when an earthquake strikes while you are at home. (ii)What is the other name of weak zones present in earth crust? (iii) What do you mean by seismic waves? 3 OR Suggest three measures to protect ourselves from lightning? 22. (i) While testing the sea water and tap water with the help of tester a boy observes more compass deflection in case of sea water as compared to tap water .Explain the reason for above cause in your own words. (ii) How can we convert distilled water into good conductor? 3 OR Is it safe for an electrician to carry out electrical repairs out door during heavy downpour? Explain. 23 Answer the following i)Name the process of fusion of gametes ii) Name two methods of asexual reproduction iii)Another term used for fertilised eggs iv)The type of fission in Amoeba. v) Name two animals in which fertilisation is external 5 24 (i) A pendulum oscillates 40 times in 4 seconds. Find the time period and frequency (ii) List any four sources of noise pollution in your surrounding. 3+2 25. (i)Explain the term global warming. (ii) Write any two harmful effects of global warming. (iii) What is acid rain ? (iv) Name any two pollutants which make rain water acidic. 5 26.(i)Differentiate between contact and non contact force and give two examples of each. (ii) Define pressure.Give its unit. 3+2 OR (i)Define force (ii)Name three effects of force? iii)What is atmospheric pressure? 27.(i)Draw the diagram of human eye and label any four parts. 5 (ii) How can you take care of your eyes ? *(Exclusively for visually impaired: (i) Write the role of pupil, iris and retina. (ii) How can you take care of your eyes ?)