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Some Natural Phenomena
Write the cuase of earthquake.
Tremors of earthquake are caused by the disturbance deep down inside the uppermost layer of the earth called the crust.
The outermost layer of earth is fragmented and each fragment is called a plate. The plates are in continual motion. When these plates brush past one another, or undergo collision, they cause disturbance in Earth's crust. This disturbance shows up as earthquakes on the surface of the earth.
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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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