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Some Natural Phenomena
Draw a diagram of balloon based experiment to show the interaction of charges.
The figure below shows the interaction of charges between balloon and the wall.
The balloon is charged may be by rubbing it on your hair. Now, the charge acquired balloon, when sticked to the wall will remain attracted to it for a certain duration of time. The balloon and the wall have now unlike charges, because of which there is attraction between both. 
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When a glass rod is rubbed with a piece of silk cloth the rod
Write T against true and F against false in the following statements:
Like charges attract each other.
Write T against true and F against false in the following statements:
A charged glass rod attract a charged plastic straw.
Lightning conductor cannot protect a building from lightning.
Write T against true and F against false in the following statements:
Earthquakes can be predicted in advance.
Sometime, a crackling sound is heard while taking off sweater during winters. Explain.
Explain why a charged body loses its charge if we touch it with our hand.
Name the scale on which the destructive energy of an earthquake is measured. An earthquake measures 3 on this scale. Would it be recorded by a seismograph? Is it likely to cause much damage?
Suggest three measures to protect ourselves from lightning.
Explain why a charged balloon is repelled by another charged balloon whereas an uncharged balloon is attracted by another charged balloon?
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