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Some Natural Phenomena
Draw a diagram to show the accumulation of charges. What is an electric discharge?
The process in which negative and positive charges meet to produce streaks of bright light and sound is called electric discharge.
The sketch below shows us the accumulation of charges on the surface of clouds and on the surface of ground. 
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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?
Describe with the help of a diagram an instrument which can be used to detect a charged body.
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