Do you have experience of the instances given below? :
A plastic comb or ruler rubbed on dry hair attracts pieces of paper. :
If we pass near a polyester curtain again and again, it gets attracted towards us. :
If we rub a blanket with our hands and take it near a metal object, a spark is seen in the dark. :
What do the above observations tell us?

Do you have experience of the instances given below? : A plastic comb or ruler rubbed on dry hair attracts pieces of paper. : If we pass near a polyester curtain again and again, it gets attracted towards us. : If we rub a blanket with our hands and take it near a metal object, a spark is seen in the dark. : What is the cause of these effects?

To charge an object by induction. : Rub a comb or a balloon on your hair. As shown in the picture 8.4 on page 54 of your textbook, take the comb near a thin trickle of water from a tap what happes. Now draw the comb away from the trcikle and observe what happens. : Mark your observation with a tick. : When the charged comb is brought close to the flowing water, water gets attracted/repelled/remains as it was. : when the charged comb is taken away from the flowing water, it gets attracted.repelled/remains as it was initially.

Read the paragraph and answer the questions given below : Our atmosphere is getting hotter. more turbulent, and more unpredictable because of the “boiling and churning” effect caused by the heat-trapping greenhouse gases within the upper layers of atmosphere. With increase of carbon, methane, or other greenhouse gas levels in the atmosphere, our local weather and global climate is further agitated, heated, and “boiled”. The green house gases such as water vapour, carbon dioxide, methane, nitrous oxide, and ozone are causing great impact on life on earth. Due to global warming, the glaciers are melting, causing sea level rise, coastal submergence and frequent natural disasters. We have to rethink while taking the development projects and help to protect the existing life forms on the earth before its too late because climate change can exterminate us. What can we do to reverse effects climate change?