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what is thunder and lightning?

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sreelekshmi_sreekumar (6 years ago)
Thunder is the sound caused by lightning.Lightning is a massive electrostatic discharge between the electrically charged regions within clouds or between a cloud and the surface of a planet.
thumbi aadhi (5 years ago)
THUNDER;a loud rumbling or crashing noise heard after a lightning flash due to the expansion of rapidly heated air. LIGHTNING;the occurrence of a natural electrical discharge of very short duration and high voltage between a cloud and the ground or within a cloud, accompanied by a bright flash and typically also thunder. "a tremendous flash of lightning".