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Physics CBSE Live product
Class 8 (2025-26)
Pressure, Winds, Storms, and Cyclones
Revision II - Pressure, Winds, Storms, and Cyclones
5.
Causes of lightning
Question:
3
m.
Fill in the blanks:
Explain how lightning occurs.
Formation of thunder
Lightning heats the surrounding air very quickly, causing
slow cooling of air
sinking of air
rapid expansion of air
uniform temperature
around the lightning path. This sudden expansion produces
gentle air movement
calm wind conditions
reduced air pressure
strong pressure waves in the atmosphere
These waves are heard as
flashes of light
vibrations of the ground
echoes from buildings
a loud sound called thunder
.
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