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Lightning is a giant electric discharge ...

Lightning is a giant electric discharge between the bottom of a charged cloud and the surface of the Earth. Lightning is an electric spark, but on a huge scale. It is caused by accumulation of charges in the clouds. This vigorous movements cause separation of charges. This leads to the positive charges collect near the upper edges of the clouds and the negative charge to accumulate near lower edges of the clouds. Check the figure below and try to answer the following questions

What causes lightning?

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Negative and positive charges meet, pro ducing streaks of bright light and sound. We see streaks as lightning. The process is known as electric discharge.
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