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What causes thunder?

Published On: Jul 26 2011 03:54:06 PM EDT

Thunder is caused by lightning.

When a lightning bolt travels from the cloud to the ground it actually opens up a little hole in the air, called a channel.

Once then light is gone the air collapses back in and creates a sound wave that we hear as thunder.

The reason we see lightning before we hear thunder is because light travels faster than sound!

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