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Some Natural Phenomena
What can be other reasons of earthquake except movements in earth's plates?
Mainly the earthquakes are caused by the collision or the movements of the plates on the crust of the earth. But sometimes it is also caused due to volcanic erruptions. It can also be caused by the hitting of meteors. Underground nuclear explosions also cause earthquakes.
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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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