Why is thunder loud?

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Thunder is so loud because it is like an explosion.  It’s a sound caused by lightning, which is like a giant spark of electricity in the sky.  The lightning is incredibly hot over 50,000 degrees! It very quickly heats up the air around it, and the air expands outward very fast. The rapid changes in the air are what we hear as thunder.

Sound is our brain’s way of interpreting vibrations. When someone speaks to you, their voice vibrates the air and you hear the vibrations as sound.  The vibrations caused by lightning are much more powerful than a person’s voice. That’s why you may want to block your ears!

Lightning also usually branches out in many different directions in the sky. When we hear thunder, it’s usually not just the rumbling of one part of the sky. It’s the rumbling of a lot of different parts. 

by   (whyzz writer)
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